Under Age Booty. This term arrives from one of Maryland's elite overseers of the young. Coined in 2007, the use of this term has been passed around in a tight circle (no pun intended) of friends and acquaintances. Whenever one sees a UAB, one must at least acknowledge the presence of said child. The official saying of UAB fans is: The younger, the better.

The best place to find the U-est UABs is the hospitals when they are born. However, access is not always available so it is suggested to go to child's places such as Chuck E Cheese or Pump It Up. Although public demonstrations of UAB love is frowned upon, a UAB-ist should show it proudly and high-five, hug, kiss, then have intercourse with the finest and U-est UAB they can find.

This definition has indeed been written by the originator: ShiningSeoul.