Two Knuckle Shuffle

When you use your index and middle fingers knuckles (proximal interphalangeal joint) to rub a woman’s clitoris in a side to side motion.

John: So, did you and Angie have any fun last night?
Gave: yeah, she really loved it when I gave her the ole’ two knuckle shuffle

Mud Smurf

When a girl gives you blue balls and then poops on your balls.

Yeah last night Amanda was about to finish me off and then mud smurfed me and left.