What is Knock Knuckles?
1.
The act of simultaniously donkey punching and anal fisting a female sexual partner. Each hand goes in far enough that they can knock the knuckles of the corresponding fist. An additional partner can be used if desired.
Yo, that bitch is so kinky, she let me knock knuckles last night!
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Saying said first by youtube "star" emogirl in one of her videos. Now used all the time as a form of "OMG!" only mor..