👉 Underfleece is a slang term that refers to someone who appears to be extremely unprepared or inexperienced, but actually has extensive knowledge and skills in a particular subject. It often conveys an air of self-righteousness or arrogance, as if they have been born with a natural talent for the topic at hand. Underfleece is typically used in situations where someone seems to lack any sort of preparation or experience, such as when someone is trying to impress someone else by appearing to be
