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Slang for the female reproductive organs - namely, the vagina.

This word stems from the fact that the pubic hair on the female body naturally grows in a triangular shape.
"Jesus H Christ, Marty! I thought I'd be l337 and Dirty Sanchez her, but just before that she queefed so bad the hair on her triangle of trouble blew right off.
by Kevin Cadman May 03, 2006