McButt
A big fatlarge ass found on American women that arises from spending way too much time eating at McDonalds. The kind of booty that hangs over the side of the bench as she is shoving down another quater-pounder with cheese.
OMFG that white women's McButt is hanging so low it touches the floor.
McButt
The term for a sexual act whereby one participant places their anus on the mouth of another participant, thereby resulting in the immediate ejaculation of the receiver.
Man, I jizzed a few seconds after she sat on my face so I guess that doesn't count as a McButt.
Suzie McButt
Suzie McButt is a name applied to someone who has instegated a row of name-calling, and you have either forgotten a witty retort or you are drunk/stoned/stupid and can't remember one.
"Keep quiet, Captain Assclown..."
"You shaddup.... ..... Suzie.... McButt"
"You shaddup.... ..... Suzie.... McButt"
Slut-McButt
N. A female human who is a gross slut and probably takes it up her butt from multiple guys a week.
Bro, why are you still talking to Rachel, she's a total slut-mcbutt. She wouldn't let you watch any movies with Nicolas Cage and bossed you around like a pussy.