1. in. to masturbate. (Taboo. Usually objectionable.) Stop fucking off! You wanna get pimples?
2. in. to waste time. (Taboo. Usually objectionable.) Stop fucking off and get to work.
3. in. to go away; to get out of a place; to beat it. (Taboo. Usually objectionable.) I told him to fuck off, but he still keeps hanging around.