meaning "let's go skate(board)."
person 1: man, i'm so bored.
person 2: sko skate.
person 1: okay.
meaning "let's go skate." skaters say "let's go skate" so often that the "let's go" part is often times blended together.
person 1: hey, sko skate the ten stair.
person 2: sure.