参考译文

food idioms 03
趣味食品idioms 03 [下午茶－趣味食品习语]

cool as a cucumber
MEANING: calm, not nervous or anxious
He is always as cool as a cucumber and never worries about anything.

couch potato
MEANING: a very lazy person
He is a real couch potato and just sits around watching TV and staying indoors all day.

cream of the crop
MEANING: best of a group, the top choice
The company is well-known as a good place to work and is always able to hire the cream of the crop of university graduates.