A (traditionally) masculine man or woman, and especially a masculine lesbian. Often the "dominant" partner in a lesbian relationship, and especially of a butch/femme lesbian relationship.

Dressing masculinely does not make a woman into a lesbian, contrary to popular belief; it's usually more convenient.

Acting masculinely only means that's the gender role that the person identifies with; it has nothing to do with their sexual life. A highly masculine man could be gay for all we know and a very feminine man could be straight for all we know, and both of these cases are frequent.
Long, frilly dresses? Hair swept into a bun? Makeup? Silks and satins? Sweet, shy disposition? Definitely a femme.

Short hair? Denim? Leather jacket? Nose piercings? Motorcycles? Suits and ties? Loud and aggressive? How could that be more butch?
by Lorelili February 23, 2005
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ass belonging to a woman.
victor: damn doode i need some butche tonight.
omar:fuck, call that one girl up again
victor: oh yeah, taha!
by omar gutierrez October 15, 2006
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"Butching"- (to butch) definition: the act of really getting something done, in some way relating to being a butch lesbian.
Example: "Maegan you're really butching it right now!" (referring to carrying a lot of groceries upstairs at one time)
by sherwinre October 13, 2011
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a female who dresses in masculine looking clothing (not nessasarily mens clothing)and acts and walks masculine.
wow, that lady walks like a butch! i think she is one!
by Rachel February 18, 2004
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Masculine or Macho dress and behavior, REGARDLESS of sex or gender indentity.
"wow, that person dresses and acts in ways that are steroetypically considered masculine or macho, they are butch."
by mistress tuesday February 4, 2006
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Basically a character from Pokemon. His partner is Cassidy. Cassidy and Him are a part of team rocket, so that makes them clash with Jessie and James sometimes. Butch is famous for having his name mispronounced.

He was one of funniest in Pokemon. I will never forget him.
Ash, Tracey and Co.: Its Cassidy and Biff!

Butch: HEY ITS BUTCH! NOT BIFF!

Jessie and James: Oh, its Cassidy and Bill.

Butch: ITS BUTCH! NOT BILL!

Random person: Its Cassidy and Butch!

Butch: ITS BUTCH NOT--Oh wait.
by MisslittleSunnyMilk December 10, 2011
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An overtly/stereotypically masculine or masculine-acting woman. can be used to denote an individual, or the dominant role in a lesbian relationship. Mostly people named Selena are butches
You see Selena over there?!
YEAH!

she's a total Butch!
by swagmf February 25, 2015
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