1 definition by I'mAGlugGlugVacuum6900;)

When you're in bed with your man and he lodges his entire fist into your cooch. he then squirms his hand around until he sees his knuckles through your belly. Once seen they instantly cum.
Ronald: Did you hear? Samantha got knuckle clustered by David
Arnold: Really?
Ronald: Yeah. She died mid-way and he sat there cumming. He soiled the bed sheets completely white
Arnold: Damn. It was good when I railed her ya'know?
by I'mAGlugGlugVacuum6900;) January 11, 2023
Get the Knuckle Cluster mug.