Top Definition
To break the hymen, the membranous fold of tissue that partly or completely occludes the external vaginal orifice. Busting the taco, usually taking place during sexual intercourse, signifies the defloration of a girl.

Also, to pop the cherry.
After a very romantic dinner at Taco Bell, David turned to Julie, his fiance, and said, "I want to bust your taco."
by Kevin January 05, 2004

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