Collins COBUILD Advanced Learner's English Dictionary - wet dream

(wet dreams) 1. If a man has a wet dream, he has a dream about sex which causes him to have an orgasm while he is asleep. N-COUNT 2. If someone says that a person or thing is a particular person’s wet dream, they are saying in an unkind and mocking way that this person or thing would give that person a lot of pleasure. (INFORMAL, RUDE) N-COUNT: usu poss N