1. Reference to something cool or fun.

2. A person who has done awesome and or illegal acts.
1. Woah, dude, this is one bad-ass party!

2. Fuck, that guy is a total bad-ass..I'm gonna get his number.
by dontsweatit February 18, 2010
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In Pokemon Gold and Silver being able to travel to two regions in one game.
Have you played the new pokemon game? That shit is BAD ASS
by OMGPOKEMON July 3, 2009
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used typically as a compliment, bad ass refers to one who is very much liked. One who typically doesn't care, are themselves - real, authentic, ballsy. Has a "I don't give a f... attitude"

Adj. awesome, outstanding
Kristen Stewart is the epitome of a bad ass.
by ksbitchface January 25, 2010
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the act of being bad ass
"i like Roger Clemens bad assness"
"you gotta show your bad assness"
by Ali December 11, 2003
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a person, usually american, that is supremely confident and has the abilities to back it up. one can not be identified as a bad ass because of one action. being a bad ass is a lifelong commitment to excellence.
Amercian bad ass' would include: Chuck Norris, Austin Miller, Lil John, MIKE VALLELY, the creators of Miller High Life.
by Marcus Ta November 13, 2007
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A bottom which is naughty.

Used particularly in the context of flatulence.
(Gentleman breaks wind)

Gent: Oh BAD ASS!!! BAD ASS!!!

(Gent spanks self on posterior: not hard enough to cause permanent dysfunction, but firmly enough to punish.)
by Pipe Downn October 9, 2008
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1) the severe extreme of maxed out coolness, total disregard for all things weak (ie: emotions, fear)

2) one who follows in the footsteps of the great triumverate of badasses (Spike Spiegel, Samurai Jack, and Batman, Batgirl, Catwoman)
by Mr wonderbread1 March 1, 2013
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