Restless Leg Syndrome of the Third Leg. When a man can not keep his penis in his pants. This can either imply he is messing around or that he is very sexually active in general.
Greg: Did you go out with your girlfriend last night?
Andy: No, I met up with some other chick at the club, then banged her.
Greg: Dude, you have a serious case of rls3!
Andy: No, I met up with some other chick at the club, then banged her.
Greg: Dude, you have a serious case of rls3!
by mmecochineal June 18, 2007