A fork of Rural Dictionary
Physical damage. To "do a number" in an aggressive situation frequently implies hurting someone, usually a particular body part. For example a number is used in the phrases "I'm going to pop you one" and "a quick one-two" (in boxing).
Rough him up a little, then do a number on his face.
Short form for "phone number."
Joe: So what happened with you and that girl at the bar? Sammy: I got her number! Joe: Sweet, you'll be banging her in no time!
The number of people one has had sex with.
Bill just broke up with his girlfriend and wanted to hook up with me, but I said no because I'm trying to keep my number down.