A useful technique to use against newbies and annoying people in which the offender's top jaw is placed on a sidewalk and crushed.
Carrot Top appeared in one too many AT&T ads, he needs a California Smile.
Forcing someone on to the ground, commanding them to open their mouth and place their teeth on the side of a curb or slab of concrete, and then stomping on the back of their head/neck, effectively smashing all of their teeth, breaking their jaw, and possibly killing them.
What happens to the black fellow in American History X. See Bite the Curb