A tattoo on the lower back, usually on a female which is prominently displayed in public by wearing low-cut hip-hugger pants.
Urban legend has it that this is a signal to male suitors that she very willingly does "anal".
Yo, dat white boitch wit da butt hat is motioning fo me to come over her place and tap dat ass after she gives me a ride to the check cashin' place.
1. A lesser form of the word asshat, used in polite company.
2. An unintentional typo of "But That."
"Quit being such a butt hat in front of the kids"
"I don't know where I'm going, butt hat is half the fun."