- (vulgar, slang) To waste time with unimportant activities, often used as an admonition to urge the other party to stop wasting time.
- She's coming over in an hour, so until then I'll just fuck about on the Web.
- Don't fuck about! Hurry up and finish it.
- (markedly vulgar, slang, intransitive) To fool around.
- He was just fucking about.