1. To not take something seriously, believing the whole
thing to be a joke. It can also be used to describe a lack of
effort pertaining to a task.
2. To partake in recreational drug use, specifically hard
drugs.
see also: party
Example
1:
Student: *Tells a stupid joke in class
Teacher: Stop fucking around and get to work!
Example 2:
Drug User (girl):
Hey, are you on deck with some shit?
Drug User (
guy): What the hell are you talking about? What shit?
Drug User (girl): Like, do you fuck around?
Drug User (
guy): Ohhh I get it now. I got a little bit of crystal on me but not enough to spare.