1. ‘The best of both worlds’ – means you can enjoy two different opportunities at the same time.

“By working part-time and looking after her kids two days a week she managed to get the best of both worlds.”

2. ‘When pigs fly’ – something that will never happen.

“When pigs fly she’ll tidy up her room.”

3. ‘To cost an arm and a leg’– something is very expensive.

“Fuel these days costs and arm and a leg.”

4. ‘Let the cat out of the bag’ – to accidentally reveal a secret.

“I let the cat out of the bag about their wedding plans.”

5. ‘To feel under the weather’ – to not feel well.

“I’m really feeling under the weather today; I have a terrible cold.”

‘Break a leg’ – means ‘good luck’ (often said to actors before they go on stage).

“Break a leg Sam, I’m sure your performance will be great.”

6. ‘To hit the nail on the head’ – to describe exactly what is causing a situation or problem.

“He hit the nail on the head when he said this company needs more HR support.”

7. ‘To cut corners’ – to do something badly or cheaply.

“They really cut corners when they built this bathroom; the shower is leaking.”

8. A hot potato
Speak of an issue (mostly current) which many people are talking about and which is usually disputed

9. A penny for your thoughts
A way of asking what someone is thinking

10. At the drop of a hat
Meaning: without any hesitation; instantly.

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“What we need in this country today is more courage and more belief in the things that we have.”- Thomas J. Watson