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1.
The mass quantity of labia, or "lips", on the vagina. Normally resemble that of the lips of a cow.
She pulled down her pants and all i saw were a set of cow lips. I couldn't see anything.
by Hookielao January 08, 2009
 
2.
A Really really fat vagina.
Guy 1: Dude that girl you hooked up with last night
Guy 2: Nahh man she had cow lips...bitch was ratchet
by co___ January 31, 2014