When an fat dumpy lesbian beats herself off and since she's so fat she aggressively rubs her knuckles on her puss to get off
Patti couldn't get the job done with her dildo so she ended up knuckling one off on that big fat pussy
by Bigdickballer420 July 24, 2017
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Did you hear Nic Pledged a Fraternity?

Yaa now he sleeps and showers with 50 guys in the same room. He said he has to go into the bathroom to Knuckle one off!
by Mr Shocker September 9, 2009
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