A vulgar looking and usually bad-mouthed woman or teenage girl. Found usually in Malls trying on dresses she can't afford and chasing losers to get knocked-up.
La fille de George Bush est une petasse.
by Flo January 29, 2004
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When your pet comes and sits next to you and you realize that they smell like ass.
Bruh, WTF is that smell ?!?
Dude, it's yo pet Snoopy !!!
Eww, my dog has petass... how gross !!!
by Martinezzzzz May 28, 2015
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