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The meaning and origin of the expression: As cool as a cucumber

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As cool as a cucumber


Calm and unruffled.


Cool here means imperturbable rather than having a low temperature. Cucumbers are cool to the touch.

First recorded in John Gay's Poems, New Song on New Similies, 1732:

"I ... cool as a cucumber could see The rest of womankind."

See other 'as x as y similes'.