Cucumbers are relatively cold, or, served cold, usually. so if you are 'as cool as a cucumber' it means you're chill, or laid back
This is not an idiom. If you see "as ___ as ___" you are looking at a simile. The meaning is obvious, unlike an idiom, where the meaning is confusing unless you already know the definition.
as cool as an ice-cream
Zaphod Beeblebrox is as cool as a cucumber. Despite that he thinks tomato is as cool as cucumber if it was next to it in the veggie tray in the fridge.
When someone is said to be cool as a cucumber, this means they are very calm and collected.
It's not an idiom. AS ___ AS___ would be A Simile ... the correct simile would be as cool as a cucumber.
As cool as a cucumber is an idiom which means self-possessed, not excited, in control of one's emotions. As cool as a cucumber is a simile, which is a figure of speech that compares one thing to another. The phrase as cool as a cucumber is first seen in a poem by John Gay in the mid-1700s.
Cool as a cucumber for texting :-)
It means 'Cool as a cucumber'
As Cool as a cucumber meaning The phrase “As Cool as a Cucumber” means to be very calm, with no worries. Someone who is not affected by pressure. ... The meaning of the word "Cool" in the phrase doesn't mean having a low temperature, on the contrary, it means assured and composed. The phrase was first recorded in a poem by the British poet John Gay 'New Song on New Similies' in 1732: "Cool as a cucumber could see the rest of womankind"
cucumber
Not as cool as Big Arnie eating a nice cold cucumber on a hot summers day
the other could be "cool as a north korean slave owner who has a donkey named chavez" your welcome
A Cucumber