Butguster 

A fart, methane emission from the anus, or toot if you're under 5 years old. The phonetic opposite of gutbuster, a hilarious something or other.

Grandpa, you're an old butguster.
Whoever smelt it dealt the butguster.

Butguster by CaliGirl16 July 29, 2016

Nuut Buuster 

A man who busts entirely too many nuts or busts one gigantic nut at a given time.

"OMG! you busted one hell of a nut on my face"

"Ofcourse I did bitch, Ima NUUT BUUSTER!!!!!!!!"

Nuut Buuster by Anderson May 7, 2005

buttbuster 

large dick, usually on a gay guy who is top (like to fuck another guy)

my ass is so sore right now, this guy have a real buttbuster in his pants

buttbuster by stephane June 21, 2007

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

buttster 

A gay poser football fan who enjoys gulping semen all day.

Tommy is such a buttster

buttster by QYS November 7, 2013

rainbow bugster

When someone is in love with someone but is too afraid so they light a forest on fire.

Wow, that person is such a Rainbow Bugster.

rainbow bugster by MGS123 February 22, 2015

Buttster 

A fat lard that is mean to everyone and deserves to have their nipples chopped off and fed to a parrot.

Hey those buttsters just pooped on my pillow fort!

Buttster by BigFroDH March 30, 2019