butt gas 

Gas eminating from one's anus.

Brandi has gas. Not butt gas. Mostly just burping.

butt gas by SueB December 7, 2006

butt gasket 

The sanitary paper seat covers for a public toilet.

Walking out of the bathroom, someone says: "Dude, you got a butt gasket stuck to your shoe."

butt gasket by Rev. Bill October 20, 2007

buttgasm 

The greatest shit of your life. Clenching you cheeks on the way to the toilet, praying you make it on time. When those sweet buns finally touch the seat an overwhelming feeling of pride and relief overcomes you and one cant help but squeel in satisfaction.

Mike: dude i heard some pretty wierd noises coming from the bathroom.

Chris: oh i was having a buttgasm

Mike: you know how i know you're gay?

buttgasm by mike the liar December 12, 2010

buttgasm 

it's like an orgasm, but in your ASS.

I crammed this bannana in my ass and proceeded to experience a buttgasm.

buttgasm by otto von jizmark September 3, 2004

Toy Story Buttgasm

An orgasm through the butt achieved while watching Toy Story.

Woody: We've got to do something about this!
Audience member: Oh oh oh oh oh oh!!!!! Toy Story Buttgasm!

Toy Story Buttgasm by crashandburnofficial June 29, 2010

Buttgasm 

After holding in rectal sepage for a long while, and finally being able to sit on the toilet and let it go. The rectal sepage comes out at an alarming rate and you seem to show symptoms of having an orgasm. Can be induced by continual diarrea.

Could be pull over? I feel a buttgasm coming on.

Buttgasm by Jamie H. May 10, 2007

Buttgasm 

When you let off such a large, relieving fart that just makes you feel so much better that you achieve a state of euphoria known as the Buttgasm.

An hour after I ate a bunch of burritos, I farted so much that I had a buttgasm!

Buttgasm by Vofman March 7, 2009