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A term given to a person (typically a female) who acts or does something in a "hard-ass", asshole, and/or tough-girl manner. The Betty Badass themselves, of course, do not think they are a "Betty Badass"; the term is usually told to, or directed at, someone in order to poke fun at, or to express contempt for, their prior, recent, or planned excessive or flamboyant actions.
EX1:

Girl 1: "If this cop gives me any shit, I'm gonna smash his face in".

Girl 2: "Yeah, whatever...Betty Badass".

EX2:

A little Punk teenager comes strutting into a store like she owns the place.

Store Clerk: "Check out this Betty Badass".
by dshram March 06, 2017
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