to say deuces (goodbye) to someone and then flick then off (fuck you). Usually used when someone pisses you off or you don't want to talk to them anymore. (Yes it means you put two fingers up and then leave the middle one up.)
"why are you acting like a little bitch...that's why no one can stand you!"
"Man, two fingers up, one down"
"Man, two fingers up, one down"
by U.s.A. August 27, 2009