A 10 , bad , keeper
Promising is not an idiom -- it is a word. Idioms are phrases.
an idiomatic expression
No, it is a word. Idioms are phrases that make no sense unless you know the definition.
A Bone of Contention.
is the word "distinguished",be exceptionally goal or something of high quality.
Is there such a thing as a safe expression of love? He did not know the meaning of that idiomatic expression in Spanish. She wore a puzzled expression as she entered the room.
idiomatic expression
"Turn a deaf ear" is an idiomatic expression meaning to ignore or pay no attention to something.
Body is a word -- it can't be an idiom. You can find many meanings for this word in any good online dictionary.
"You" is not an idiom. It is a pronoun.
Idiomatic expression