be as cool as a cucumber

be as cool as a cucumber

slang To be calm and composed, especially in times of stress. I was petrified to take the stage, but Alice was as cool as a cucumber. Practicing meditation has helped me to be as cool as a cucumber in times of trouble.
See also: cool, cucumber
References in periodicals archive ?
Everyone seems to be as cool as a cucumber about the prospect of abseiling, but I am sure that that will change when they are dangling at the end of a rope