side buster 

Someone who rudely interupts a conversation by adding their unwanted two-cents.

Bob: "yo johnny do you know where i can score some dope?"
Random Side Buster: "crack is wack."
Johnny: "listen bitch, ain't nobody ask for your opinion. Take your side buster ass somewhere else."

side buster by straightupGsince1989 December 9, 2008

Side buster 

Someone who decides to enter a conversation already in progress in which he/she was not a part of. Normally the person comes out of no where.

Jamie to Mindi: "I hate boys they smell"
Mindi: I agree they really..."
rudely interrupted by stranger
Stranger "You know not all of us smell you"

Mindi and Jamie: "SIDE BUSTER"

No one was fucking talk to you stop side busting douche bag.

Side buster by j dizzle jenkins February 10, 2009

sitebuster 

An online video that garners so much traffic in a short amount of time that it leads the server hosting it to crash.

Joss Whedon's Dr. Horrible was a real sitebuster.

sitebuster by Mr. Brady Brim-DeForest August 21, 2008

sitebuster 

An online video that when released attracts so much traffic that it crashes your site, the same way a blockbuster movie sells out theaters.

"Dr. Horrible should prove to be a profitable venture in the end, and will probably establish itself as the 'sitebuster' hit of the summer..." – Tubefilter

sitebuster by Tubefilter August 18, 2008

sidebuster 

somebody who always tries to include themself in a conversation.

that fool joe is a sidebuster.

sidebuster by fotweny November 9, 2004

Sidebuster 

Someone who in gets in to other peoples conversations without being directly acknowledged or asked for an interjection of some sort.

I'm about to smack the shit out of this Sidebuster!

Sidebuster by Mudd Shark September 25, 2007

sidebuster 

A sidebuster could also mean someone who is fake or phony portraying to be cool.

that fool joe is a sidebuster.

sidebuster by shawn Roberts January 17, 2008