As cool as a cucumber

Meaning

Used to describe someone who remains calm and collected under pressure. It suggests that the person is unshaken even when everyone else is panicking.

Complimentary, observational

Used in a sentence

• Even when the kitchen caught fire, the chef stayed as cool as a cucumber.
• She walked into the interview as cool as a cucumber despite being nervous.
• He watched his car slide into the ditch while remaining as cool as a cucumber.