1 definition by Umakhi
A hand job or male masturbation with 1, 2, or 3 knuckles of a finger in the anus to stimulate the prostate and cause a sudden intense orgasm.
Dude, I finally got a 3 Knuckle Chuck! I came everywhere!
You're definitely gonna buck when she hits you with a 3 Knuck Chuck!
You're definitely gonna buck when she hits you with a 3 Knuck Chuck!
by Umakhi June 16, 2022