A person who constantly annoys people either
for the fun of it or he/she is just completely stupid knowing that he/she will obviously get in trouble with a painful punishment (Hitting, yelling,
scolding,
grounding, etc).
"
Could you get that little Smack-Ass off of my
lawn?", "
Keep that Smack-Ass away from me!", "You Smack-Asses are going to get it now!"