It means the next time you see that person you are going to fight them. You will go head up on sight.
Guy 1: Bro, tony told me he fucked your sister
Guy 2: What???? On my momma next time i see him its head up on sight.
Guy 2: What???? On my momma next time i see him its head up on sight.
by chickenwickenlicken November 17, 2010
Get the Head up on sightmug.