The missing Lateral Incisor tooth or Canine tooth (or both) found on most girls in their late twenties to early thirties who have partied WAY too much in their time.
While missing front teeth will usually be repaired or replaced, the teeth on the sides are often sacrificed at the expense of saving some good partying money.
"Yo, that girl at the end of the bar is pretty tight, yo."
"Yo, she got's da Crack Window action too. You can probably score some snow after you hit it, yo."