When everything is good about a girl except her tits (but her tits) hence the buttertits.
Johnny: Dayum, that girl is fuckin hot!
Joe: No man, check it out, she's a major buttertits.
Johnny: Ah, shit man. She's got that smokin hiny, perfect face, too bad she's as flat as a piece of paper.
1.type of physical action that takes place when a goofey or "special" person runs. Usually a very embarising site for the performer, yet often hillarious to those who witness the action.