What is Back-vag?
1.
When a persons ass crack is showing above the waist of their pants creating a vagina like crack on their backside.
Mike "Dude, that girl in front of us in economics totally had a back-vag going on."
Al "I know man. It was so hot."
Mike "Dude! She was 300 pounds at least!"
Al "I know."
See
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Would still cause massive damage if it crashed into Ur-anus.
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1.
the act of clenching ur hand into a fist, then with the knuckles pointing at the vagina rub the knuckles up and down against it, the rid..