As a verb: to schmuck someone or to be
schmucked; to shove someone by their face.
One of the most humiliating moves you can use in a confrontation and/or
street fight.
Completely degrades the opponent because their face is being
smothered as they are shoved. Shows complete disrespect without actually striking the opponent.
The guy was talking shit, I knew he was a
bluffer and wouldn't make the first move, so I just
schmucked him real quick. You know just to get it to
pop off, without totally suckering this fool. He was humiliated.