Also refers to rasher doing wheelspins on one's genitalia because you fucked his girlfriend.
guy 2: No dude, he's a RASH.
Guy 2: Sure.
Rash : Cool, when are we meeting?
Guys 1 & 2 : Fucking rash.
"In a moment of rashness I cut off my nose"
"Mate, I just drank four bottles of bleach!"