bumfast 

A morning bumming session in place of breakfast

Mark and Neil have gone for there Wednesday morning bumfast.

bumfast by notoshrekchars October 23, 2013

bumpaste 

An exceptionally unpleasant consistency of diarrhea, noted for its stickiness and slight remnants of solidity. A sour mash besmirching ones undergarments.

"My guts are bloody awful after that curry, I've been making bumpaste all day."

bumpaste by Boris DeMilo January 20, 2009

bumbastain 

A jamican insult, often used jokingly but can also be quite offensive

wa gwann bruv - Rasta 1
Rasclat bumbastain, aye - Rasta 2

bumbastain by DMCliff August 8, 2007

bumnasty

combination of words that, together, form a pretty disgusting interjection/insult.

why the hell do you have to be so bumnasty about this?

ah bumnasty!! i broke my bomberman figurine!

bumnasty by Bumnasty Burger January 20, 2005

Bumtastic

His bum was fantastic.

His bum was fantastic. Wait...bumtastic!!

Bumtastic by HerbieFullyLoaded December 17, 2013

bumfart 

an idiotic person, someone who does silly things

don't eat at MacDonalds, you bumfart!

bumfart by Avoura December 3, 2005

bumfat 

A person with a fat bum
or a the fat on someones bum

you're a stinkin bumfat

bumfat by The class of ms m's gr 6's October 15, 2011