bum buster 

One who creates a mass strain on the anus by the cock.

Damn Sophie!,Nick showed me what it is to be a true bum buster.

bum buster by shaggy 2 dope January 27, 2007

bum buster 

the most superior form of anal beads

Little skank whipped out the bum busters.

bum buster by tanjaluvsit May 9, 2010

face like a busted bum 

Seriously ugly.
From Australia.
Aussies and Brits often use the word bum instead of arse (ass)

So it stands to reason that a busted bum would be a lot more unattractive than one that isn't busted.

"Check out this chick, she's got a face like a busted bum!"

face like a busted bum by Pastor Flagon April 22, 2014

Busted by the bum 

The situation where sexual relations in an automobile are interupted by a homeless person asking for money.

Diaz: What's wrong, Giringo?
Dave Diamond: No sexo, I got busted by the bum!

Busted by the bum by sextoaster December 12, 2004

busier than stink on a bum's nut sack 

By definition, an extremely popular and busy form of private enterprise.

Mohr: Hey Chris, do you want to grab some smoked meat at Schwartz's?

Walken: Let me tell you pal, you'll never get a table in there tonight. That place is busier than stink on a bum's nut sack!

busier than stink on a bum's nut sack by Skeletor's Havoc Staff August 1, 2013

Bumbsterbate 

When a homeless man is so lonely and bored, he has to whack it.

Yesterday in McDonald's, I walked into the bathroom and I heard the sound of the bumbsterbate, so there mus have been some dirty beatings going on in there.

Bumbsterbate by DomainofBEEP March 17, 2009

BunBuster 

One who likes to perform anal intercourse.

Plural: BunBusters

Also the name of a short-lived series of Porn Movies by "The Dark Brothers".

White Bunbusters (1985)
Black Bunbusters (1985)

My girl Pam sure likes it up the ass. Just call me 'The Bunbuster'.

Lyricslyrics from the porn movie follow:

"Baby, I was just sittin' here, lookin' at the stars, and thinkin' about that time we tried anal sex...
And it didn't work out...
Well, Baby, I want you to listen good, 'cause ya know what I'm gonna do? I'm gonna call the White Bun Busters...
And they're gonna bust yer fuckin' buns!!!"

BunBuster by ButtFuzz August 2, 2006