An aggressive grabbing and wrenching motion to the crotch. Either through self infliction or by someone else.
"I was walking down the street and this random chick crotch wrenched my balls bro!"

"Don't make me crotch wrench your balls off, you remember what happen last time"

"I was riding my bicycle this morning and hit a huge pot hole...the seat totally crotch wrenched my vagina!"
by Mikey P June 21, 2016
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