somebody who always tries to include themself in a conversation.
that fool joe is a sidebuster.
by fotweny November 10, 2004
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A sidebuster could also mean someone who is fake or phony portraying to be cool.
that fool joe is a sidebuster.
by shawn Roberts January 15, 2008
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Pertaining to graffiti, when a toy hits a wall that has already been burned by an established writer, to make it look like they know each other, in an attempt to gain some credibility
If you sidebust, you just might get your ass beat.
by Take1 March 4, 2007
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The act of interrupting a conversation that a party was not originally apart of.
Ken: So I was watching Bloodsport the other day
Truman: Really who starred in that?
Ken: I forget
Matt: Well actually it was originally supposed to star burt reynolds but it ended up being Van Damme
Ken: random as hell sidebust!
by Call'em like I see'em September 19, 2006
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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!
by Mudd Shark September 12, 2007
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a sexual technique wherein the male has sex with the female while both are lying on their sides.
Origin - Came to be popularly known because of a prophet named Harrison. After seeing a bunkbed with a remarkably low ceiling while apartment hunting, he remarked "Wow, I'd have to hit sidebusters if we lived here."
"I was tired of standing up, so I decided to hit sidebusters for a while."
by A-Trane Hough February 11, 2005
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When playing an online shooting game, it is the act of killing someone who is distracted by being already engaged by another opponent. It is often used for killing an opponent of superior skill, or to steal kills from other players.
ie: Two players are fighting 1 on 1 in a game, and some Gmoney comes flying in from behind and sidebusts the one guy from behind, stealing the kill.
by AbandonAllHope June 20, 2012
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