(For 2): Your boyfriend is so cool, I can't believe you fuck around behind his back.
(For 3): Get back to work, we don't have time to fuck around here!
Teacher: All you do is fuck around in my class and break the rules. Don't blame me for your shitty grade.
Person 1: That same fucking cop arrested me again!
Person 2: Well then don't piss him off. I know that guy, and he doesn't fuck around.
billy: fuck around??
Bob: i shit you not dude
2. bob:yo dat party was off da hook yo
Billy: fuck around!! fo' real yo