Origin of Phrases - C
Cool as a cucumber
Meaning: Very cool, relaxed and in control.
Example: The trick to handling a job interview is to walk in cool as a cucumber and pretend you know what you are talking about.
Origin: "Cool as a cumber" is an alliteration.
Alternatively,
A cut cucumber actually can feel cool to the touch. This is because they are very moist, evaporation of the moisture provides a cooling effect. The bizarre image of woman receiving facial treatments with slices of cucumber on each eye is brought to mind. It is precisely for this cooling effect that this is done.