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Someone, normally a guy, who thinks no one can beat him in a fight, a gun battle, or any other confrontation.
John tries to warn Mike that no one is invincible these days and to stop starting fights, but he won't listen cuz he's Billybadass.
by Sahale December 21, 2008
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Jun 24 Word of the Day
An exclamation made when your friends or family are teasing you to a point where you can't handle it anymore and a hissy fit is in order.

Derived from a YouTube user's famed outburst following Britney's lackluster performance at the 2007 VMA's.
Sarah: 'OMG Susan, I can't believe you are wearing the same skirt as yesterday. Oh, and by the way, EVERYONE knows what you did with Kevin on the weekend. Plus you look a little fat, are you retaining water?'

Susan: 'LEAVE BRITNEY ALONE!'
by Billy Chickenhole September 15, 2007
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3
A person of the male persuasion who considers themselves to be peticularly hard or who thinks they are a thug. In most cases those fitting this definition are merely insecure about the less than spectacular size of their wang.
Calm down Billy badass. Do you think your Billy badass?
by Jario Florez March 10, 2005
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4
A guy who thinks that he is particularly harass or bad, but he is actually a joke. A real doucher.
Guy1: I'll mess you up!!
Guy2: Whatever, billy badass..
by veronicalovin August 28, 2009
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5
one who is known as a great fighter. intimidates others with his mere presence. usually employed as a doorman, security guard or body guard. 500 pound gorillas carrying badges have commonly been mistaken for a billy bad ass.
"Don't dare mess with Motu. He's a billy bad ass!"
by Albert Einstein1 May 03, 2006
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6
One who always dodges rocks. L.G.A. One who drives a black mustang convertible with white stripes and black bullitt wheels with a chrome lip. One who hates treacherous girls and hot boys.
There goes Louis being billy bad ass; he did a burn out in front of the police while smoking weed.

by Kevin peter May 21, 2008
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