double knuckle shuffle 

Two fisted knuckle shuffle.

Whoa! I just walked in there and Billy was doing the double knuckle shuffle on the piss pump!

double knuckle shuffle by leadmine October 8, 2006

double-knuckle-shuffle

The double-knuckle-shuffle is a masturbation technique only known by the greatest baiters.

hey do you know the double-knuckle-shuffle?
the double-knuckle-shuffle is learned not taught.

double-knuckle-shuffle by (|-|4c| September 22, 2023

Double knuckle shufle 

Inserting one finger in the vagina and one in the ass.

I was applying the double knuckle shuffle to your mother last night.

Double knuckle shufle by Moolie April 6, 2005