It's a little more involved than simply banging someone's head against the curb. It actually means to force someone to lie down, open their mouth and bite down on the edge of the curb, then you stomp on the back of the person's head with as much force as possble(presumably breaking the person's lower jaw clean off or even cause death). I've heard the term used as far back as 1993.
One of the best shows on TV, and the funniest show ever created, technically a sitcom, but the show does not feature a laugh track, which makes it 4000 times funnier, and doesn't stall the show, as most laugh tracks do. Contains a visual style that takes some getting used to, but once you do it will look normal. The humor is side-splittingly hilarious and will remain so even after multiple viewings.
Fun Fact: David originally wanted to call the show "Soup's too distracting" after being asked "Soup or Salad" at a restaurant and proclaiming to the waitress "Soup's too distracting"