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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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Nov 27 Word of the Day
A stupid person; it refers to the lack of surface area on an individual's brain. The general thought is that the more surface area (wrinkles, creases, etc.) a brain has, the smarter the person is. Conversely, a person with a smooth brain (no wrinkles) has less surface area and would therefore be stupid.
That fucking smooth brain put his shirt on backwards again...

That smooth brain is dumber than a pile of shit.
by Tip Tank May 14, 2011
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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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