Idioms explained for parents (Australia)

Your child comes home puzzled: the teacher said the class needed to "pull their socks up", and nobody was wearing socks. Or a character in their chapter book "spills the beans" and there isn't a bean in sight. Moments like these are your child bumping into idioms — fixed phrases whose meaning can't be worked out from the individual words.

Adults use idioms so automatically that we forget how odd they sound the first time. For a child reading alone, an idiom is a small wall: every word decodes perfectly, yet the sentence makes no sense.

Here's what idioms are, how they differ from the other devices on school worksheets, a simple routine for cracking a new one, and ways to build idiom knowledge at home without a vocabulary drill. Idioms belong to the wider family of figurative language; this page sticks to idioms alone.

What makes a phrase an idiom

Three features give an idiom away:

1. The meaning isn't in the words. "Under the weather" means unwell. Nothing about weather, and nothing about being under it.
2. The wording is fixed. You can say someone "let the cat out of the bag", but not "let the dog out of the box". Change the words and the meaning disappears.
3. Everyone in the language community already knows it. An idiom is shared. A brand-new comparison invented by a writer is something else (often a metaphor).

That third point is why idioms feel easy to adults and hard to children. They're less a reasoning puzzle than shared cultural knowledge — you've either heard "break a leg" before or you haven't. Luckily, that knowledge grows fast with conversation and reading.

Some idioms your child is likely to meet

Idiom	What it means
a piece of cake	very easy
under the weather	feeling sick
spill the beans	tell a secret
let the cat out of the bag	give away a secret by accident
hit the books	study hard
cost an arm and a leg	very expensive
bite off more than you can chew	take on too much
barking up the wrong tree	looking in the wrong place or blaming the wrong person
get cold feet	become nervous and back out
in hot water	in trouble
the ball is in your court	it's your turn to decide
once in a blue moon	very rarely

And a few with an Aussie flavour that might turn up in local books or in the playground:

• spit the dummy — throw a tantrum
• flat out like a lizard drinking — extremely busy
• she'll be right — it will all work out
• have a go — give it a try

Ten common idioms properly understood beat a memorised list of fifty obscure ones.

Idioms and their look-alikes

Worksheets in the middle and upper primary years often ask children to label a phrase. These are the ones most easily confused with idioms:

Type	How to tell	Example
Idiom	Fixed phrase; meaning can't be worked out from the words	"It's raining cats and dogs"
Simile	Compares using like or as	"as slow as a snail"
Metaphor	Says one thing is another, usually invented for this text	"The classroom was a zoo"
Hyperbole	Wild exaggeration for effect	"I've told you a thousand times"
Proverb	A complete saying that gives advice	"Don't count your chickens before they hatch"
Slang	Informal single words or short terms	"arvo", "brekkie"

Overlaps are common. "Cost an arm and a leg" is an idiom that also exaggerates, so it's arguably hyperbole too. "As busy as a bee" uses as, which makes it a simile, but it's so familiar that some teachers will also call it an idiom. When a phrase fits two labels, the best answer explains both: "It's a simile because of as, and an idiom because everyone already knows it."

Why idioms can stump confident readers

A fluent reader doesn't automatically understand everything they read, and idioms are one of the clearest exceptions. They're especially tricky for:

• Younger readers, who naturally take words at face value.
• Children learning English as an additional language or dialect, who may decode the words perfectly but haven't grown up hearing the phrases. Their home language will have its own idioms, which is a great thing to talk about.
• Literal thinkers, some of whom take longer to accept that words can mean something quite different from what they say. This is a common, normal variation in how children process language.

None of this means a child is behind. Idioms just need to be explained and experienced, not only decoded.

A four-step way to crack an unfamiliar idiom

When your child hits a phrase that doesn't make sense, this routine works well. It's a version of clarifying while reading and leans on inference:

1. Notice the mismatch. "Wait — that doesn't make sense if I take it literally." Stopping here is the skill; many children just skim past.
2. Look around it. What's happening in the story? How does the character feel? What happens next?
3. Make a guess. "I think 'in hot water' means in trouble, because the next line says Mum is furious."
4. Test the guess. Swap your meaning into the sentence. "Jack was in trouble after he broke the window." If it fits, you've probably cracked it.

When the context gives nothing away, simply tell your child or look it up together — asking is what active readers do. More on new words: vocabulary while reading.

Where idioms sit in the Australian Curriculum

The Australian Curriculum: English (version 9) asks students across the primary years to build vocabulary, understand how language changes with context and audience, and look closely at the word choices authors make in literature — figurative language among them — and what those choices do for a reader. Idioms belong to that work, along with understanding that everyday spoken English differs from formal written English.

No list of idioms or set year appears in the curriculum, so schools differ — you might meet idioms in a Year 3 word study, a Year 4 figurative language unit or Year 6 persuasive texts. Victoria's Curriculum 2.0 follows version 9 closely.

How idiom knowledge typically grows

Prep–Year 1: children hear idioms in songs, picture books and family talk ("You're the apple of my eye"). Enjoy them out loud; no labels needed. More on this stage: Prep reading and reading milestones Prep–Year 2.

Year 2: children start noticing that some phrases are "not what they sound like" and can ask what they mean. See Year 2 reading.

Years 3–4: the word idiom often appears. Children explain the meaning of common idioms and begin to sort them from similes and metaphors. Overviews: Year 3, Year 4.

Years 5–6: children use context to work out unfamiliar idioms, discuss why an author or speaker chose one, and use a few deliberately in their own writing. Overviews: Year 5, Year 6.

Treat this loosely: kids from chatty, idiom-rich homes often race ahead, and others catch up quickly once they start noticing.

Why authors use idioms

When an upper-primary question asks why a writer used an idiom, these answers usually fit:

• To make dialogue sound real. People speak in idioms, so characters who use them sound natural. A grandad who says "she'll be right" and "time to hit the hay" tells you something about him, which links to characterisation and dialogue.
• To set a tone. Idioms make writing feel casual and friendly (tone).
• To say a lot quickly. "He got cold feet" is shorter than "He became nervous and decided not to go ahead after all."
• For humour. Some books play with idioms by picturing them literally — a character who really does let a cat out of a bag.

A complete answer gives the idiom, its meaning and its effect: "The author wrote that Mia 'got cold feet' to show she was nervous, which makes us worry she won't go on stage."

Using idioms in their own writing

One or two idioms used well, ideally in dialogue, impress teachers more than a string of them. Tips for drafting:

• Put them in a character's mouth. Idioms suit speech better than narration.
• Check the meaning first. An idiom used in the wrong place ("I was over the moon when my goldfish died") confuses readers.
• Skip worn-out ones in description. A fresh comparison beats "quiet as a mouse".
• Match the text type. Fine in stories, out of place in a science report.

Easy idiom games for home

1. Draw it literally. Choose an idiom and both draw what it would look like if it were true — a person sitting under a storm cloud for "under the weather". Then write the real meaning underneath.
2. Idiom of the week. Stick one on the fridge and see who can use it naturally in conversation by Sunday.
3. Match-up. Write idioms on one set of cards and meanings on another. Turn them face down and play memory.
4. Home language swap. If your family speaks another language, share an idiom from it and translate it word for word. Comparing the two is fun and builds real language awareness.
5. Spot it in the wild. Keep a family list of idioms heard on TV, in the footy commentary or at school pick-up.

Idioms are naturally funny, and laughing at the literal picture is often what makes the meaning stick. If reading at home is already a battle, play these in the car or over dinner rather than at the desk (homework without tears).

Where children commonly go wrong

Taking idioms literally. Expected at first. Explain gently, enjoy the funny picture, and move on.

Changing the wording. "Let the dog out of the bag" or "a piece of pie". Point out that idioms only work in their fixed form.

Labelling every simile an idiom. If there's like or as and the comparison is fresh, it's a simile.

Skipping over phrases they don't understand. Encourage the habit of stopping and asking — it's a key part of reading comprehension strategies at home.

If you're concerned

If your child is in the upper primary years and still takes most non-literal language at face value, or is regularly confused by everyday expressions in conversation, mention it to the class teacher with a few specific examples. Ask how figurative language is being taught and whether there's anything to reinforce at home.

For wider worries about reading, try Is my child behind in reading?, when to worry about reading and support for a struggling reader. This guide offers general information only; questions about language development or learning needs should go to the school or an appropriate professional.

FAQ

What is an idiom in simple words?

A phrase that means something different from its words — like "piece of cake" meaning easy.

What's the difference between an idiom and a metaphor?

A metaphor is usually a fresh comparison a writer creates. An idiom is a fixed phrase that everyone already knows, and its meaning can't be worked out from the words.

Is "raining cats and dogs" an idiom or hyperbole?

It's mainly an idiom. Because it also exaggerates, some teachers accept hyperbole too.

What are some common Australian idioms?

"Spit the dummy" (throw a tantrum), "flat out like a lizard drinking" (very busy) and "she'll be right" (it will be fine) are well-known examples.

When do kids learn about idioms in Australia?

Usually somewhere in Years 3–6, often as part of figurative language, but schools vary.

Try this tonight

Next time someone at your table uses an idiom — and someone will — stop and ask your child what it would mean if it were literally true, then what it actually means. One or two of these a week will grow a surprisingly big collection by the end of term.

If you're wondering how your child's reading is tracking more broadly, Ziado offers a free check that takes about ten minutes. It adapts as your child answers and gives you a partial snapshot of results; you don't need to set up an account or enter a card, and the full placement becomes available after signing up. It doesn't test idioms specifically, it isn't a NAPLAN practice tool, and it isn't a dyslexia screen or medical assessment. Ongoing adaptive practice is outlined on Ziado reading — Individual and Family plans each include a 14-day free trial, with details on the pricing page.