bi butt 

similar to a fupa (Fat Upper Pubic Area) or bif, (butt in front), from the waste down, you can't tell whether if a bi butt is coming or going. A true bi butt actually has two fully formed butt cheeks on each side, two in front, two in back. The front or rear plumber's crack is optional and generally not visible, since a bi butt's pants tend to be belted across mid stomach area or even higher in some cases.

Notre Dame Football coach Charlie Weis has a bi butt. Some older women are also bi butts or bi buttual.

bi butt by DutchRub September 16, 2009

Bi-Polar Butt Disease

A case in which you have very smelly farts sometimes uncontrollably expelling from your anus, but you ate nothing to provoke such an occurrence.

Dude Ian has major Bi-Polar Butt Disease this evening.

Bi-Polar Butt Disease by Guitargod10940 April 12, 2009

B.i.B (Blanket in the Butt)

All day spent on the couch generally not giving a f*ck about the world or interacting with the human race. Wrapped in a blanket, it's the ultimate chill day. Waisting your entire day watching TV, playing video games, watching movies, often times in your pajamas and not showered for the entire day. B.i.B usually occurres following a long work week, a night of heavy partying, or when your home sick.

Ex 1) You're hungover? Are we gonna see you later or are you B.i.B (Blanket in the Butt)?

Ex 2) I had a f*cked week at work, I'm B.i.B all weekend...

Ex 3) I've got the cold from hell, I'm B.i.B with some hot & sour soup and Theraflu.

B.i.B (Blanket in the Butt) by T. Dub January 12, 2013