Bum Bum Fly 

Any flying insect which can be found hanging around the anus of cattle / sheep and / or welshmen.

Have been known to descend to feast upon shite from said critters arses.

Look at the way the bum bum fly just hangs there...

Bum Bum Fly by urbankhaos May 6, 2003

bum-flu 

To have AIDS fully blown

as a physical desciption":

Look at her!!! She';s gotta have bum-flu!!

bum-flu by Noels April 23, 2006

Bum Cleavage 

The view you get when people bend over and the top of their butt crack can be seen.

Look at her bending over, you can totally see her Bum Cleavage

Bum Cleavage by Cum and Get It August 5, 2010

Bum Scum 

The lint that is in your ass crack that comes from your underwear!

Mike - "Man did u fuck that hot ass hoe last night?"
Ephraim - "FUCK NO THAT BITCH HAD TO MUCH BUM SCUM!!!"

Bum Scum by tootfartparty97 August 22, 2010

bum wee 

Diarreah.

Liquid shit or bum wee

bum wee by wurzel79 October 12, 2008

bum titties 

Fat chicks with tits on their back - also known as 'Back Titties'. Female equivilant of love handles but higher up.

ooooooohhhh that fat bitch has some big ass bum titties! She must have gotten implants whilst lying down on her front! what a cunt!

bum titties by Robert J. Melrose September 4, 2003

Bum Jigger 

A homosexual, some one who fishes in bums

"That Brain is a bum jigger"
"You bum jigger, get out!"

Bum Jigger by AH-EL October 26, 2003