Idioms for IELTS Speaking — 32 Natural Expressions with Examples (Band 7+)
Idiomatic language is named explicitly in the IELTS Speaking band descriptors: to reach Band 7 for Lexical Resource you must use 'some less common and idiomatic vocabulary', and Band 8 expects you to use idiom 'skilfully'. The catch is that examiners reward idioms used naturally and accurately — a forced or misused idiom hurts more than it helps. The 32 expressions below are common, register-appropriate for the test, and easy to slot into real answers. Each one has a plain-English meaning, a natural example in an IELTS Speaking context, and a simpler equivalent so you can see exactly what you are upgrading. Learn a handful you genuinely like, practise them out loud until they feel automatic, and deploy two or three across your test rather than stuffing in as many as possible.
IELTS prompts where this vocabulary fits
- Speaking Part 1: How often do you eat out? ("Only once in a blue moon, to be honest.")
- Speaking Part 2: Describe a time you felt really happy. ("I was over the moon when…")
- Speaking Part 3: Is social media good or bad for society? ("I'd say it's a double-edged sword…")
Idioms for Speaking vocabulary table
Each row gives the word, part of speech, plain-English definition, an IELTS-style example sentence, common collocations, and an optional band-7+ synonym you can swap in for variety.
| Word | POS | Definition | IELTS-style example | Collocations | Band-7+ synonym |
|---|---|---|---|---|---|
| once in a blue moon | idiom | Very rarely; almost never. | “I only eat fast food once in a blue moon — maybe two or three times a year.” | frequency answers (Speaking Part 1) | rarely |
| over the moon | idiom | Extremely happy about something. | “I was over the moon when I found out I'd passed my driving test on the first attempt.” | describing emotions and good news | delighted |
| a piece of cake | idiom | Something very easy to do. | “The interview turned out to be a piece of cake because I had prepared so thoroughly.” | describing difficulty | very easy |
| hit the books | idiom | To study hard, especially before an exam. | “With my final exams coming up, I've really had to hit the books this month.” | study and education topics | study hard |
| break the ice | idiom | To say or do something to ease tension when people first meet. | “A good host will usually crack a joke to break the ice when guests arrive.” | social and communication topics | ease the tension |
| on the same page | idiom | In agreement; sharing the same understanding. | “Before we started the group project, we made sure everyone was on the same page.” | teamwork and work topics | in agreement |
| cost an arm and a leg | idiom | To be extremely expensive. | “Renting a flat in the city centre can cost an arm and a leg these days.” | money and cost topics | very expensive |
| the best of both worlds | idiom | A situation that combines the advantages of two different things. | “Working from home two days a week gives me the best of both worlds — focus and flexibility.” | weighing advantages (Part 3) | an ideal balance |
| burn the midnight oil | idiom | To work or study late into the night. | “I had to burn the midnight oil for a week to finish my dissertation on time.” | study and work topics | work late |
| get the ball rolling | idiom | To start something happening. | “To get the ball rolling, I'd say the most important factor is good planning.” | structuring an answer | get started |
| a blessing in disguise | idiom | Something that seems bad at first but turns out to be good. | “Losing that job was a blessing in disguise because it pushed me to retrain in something I love.” | outcomes and turning points | an unexpected benefit |
| under the weather | idiom | Slightly unwell. | “I'm feeling a bit under the weather today, so I'll probably have an early night.” | health and daily-life topics | slightly ill |
| pull yourself together | idiom | To calm down and regain control of your emotions. | “After hearing the bad news it took me a while to pull myself together.” | describing emotions | compose yourself |
| a steep learning curve | idiom | A process that is difficult to learn at the beginning. | “Starting my first job involved a steep learning curve, but I adapted within a month.” | work, study and skills topics | hard to learn at first |
| think outside the box | idiom | To think in a creative, unconventional way. | “The best designers are always willing to think outside the box.” | creativity and work topics | think creatively |
| in the long run | idiom | Over an extended period of time; eventually. | “Investing in good education pays off in the long run, even if it's expensive now.” | Part 3 opinion answers | eventually |
| keep an eye on | idiom | To watch or monitor something carefully. | “I like to keep an eye on the news so I stay informed about current events.” | habits and routines | monitor |
| face to face | idiom | In person, rather than online or by phone. | “I much prefer talking to friends face to face rather than over text.” | communication and technology topics | in person |
| a far cry from | idiom | Very different from something else. | “Today's smartphones are a far cry from the bulky mobile phones of the past.” | comparison answers (Part 3) | very different from |
| take it for granted | idiom | To fail to appreciate something because you assume it will always be there. | “We often take clean water and electricity for granted until there's a shortage.” | society and environment topics | fail to appreciate |
| last but not least | idiom | Finally, but no less important than the others. | “Last but not least, I'd say honesty is the most valuable quality in a friend.” | concluding a list of points | finally |
| the tip of the iceberg | idiom | A small, visible part of a much larger problem. | “The traffic congestion is really just the tip of the iceberg of the city's transport problems.” | describing problems (Part 3) | a small visible part |
| go the extra mile | idiom | To make more effort than is expected. | “Great teachers always go the extra mile to help their weaker students.” | work, education and effort topics | make extra effort |
| a double-edged sword | idiom | Something that has both positive and negative effects. | “Social media is a double-edged sword: it connects people but can also harm mental health.” | balanced opinion answers (Part 3) | a mixed blessing |
| food for thought | idiom | Something worth thinking about seriously. | “The documentary on climate change really gave me a lot of food for thought.” | ideas and media topics | something worth considering |
| see eye to eye | idiom | To agree completely with someone. | “My brother and I don't always see eye to eye on politics, but we respect each other.” | relationships and opinion topics | agree |
| up in the air | idiom | Uncertain; not yet decided. | “My plans for the summer are still up in the air because of work.” | future plans (Part 1 and 2) | undecided |
| cut corners | idiom | To do something cheaply or carelessly to save time or money. | “You really shouldn't cut corners when it comes to health and safety.” | work and quality topics | skimp |
| bite off more than you can chew | idiom | To take on more than you can realistically handle. | “I bit off more than I could chew by signing up for five courses in one semester.” | workload and study topics | take on too much |
| on cloud nine | idiom | Extremely happy and excited. | “She was on cloud nine after being accepted into her dream university.” | describing strong positive emotions | elated |
| a rough patch | idiom | A difficult period of time. | “Every long friendship goes through a rough patch now and then.” | relationships and life-event topics | a difficult period |
| call it a day | idiom | To decide to stop doing something. | “After eight hours of revision I decided to call it a day and rest.” | routines and work topics | stop |
Using these in IELTS Speaking
IELTS Speaking rewards natural production over recall. Aim to slip a higher-register word like once in a blue moon or a blessing in disguise into your answer at the moment the question invites it, rather than forcing a memorised phrase into the opening sentence. Examiners notice when vocabulary feels rehearsed.
If you are not sure of a collocation, use a slightly safer word you control. A single confident use of the tip of the iceberg in Part 3 — where the question explicitly invites discussion — gives examiners more evidence of range than a stilted opening sentence with three advanced terms.
Common traps to avoid
The most common idioms for speaking trap at band 6.5 is collocation mismatch — using a word in a combination native speakers would not produce. The collocations column on the table above is the most important field for avoiding this; learn once in a blue moon not as a single word but as part of the collocations listed beside it.
The second trap is register mismatch: using an informal word in a Writing Task 2 essay, or an overly formal word in a personal Speaking answer. The example sentences on this page are calibrated to the register IELTS expects for each section listed in the header.
Common questions
How many of these idioms for speaking words do I actually need to know?
Will I lose marks if I use an unfamiliar word incorrectly?
Where in the IELTS exam does idioms for speaking vocabulary appear?
How should I memorise this vocabulary effectively for IELTS?
Will overusing connectors hurt my Writing band?
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