suckle the knuckle

Term meaning “kiss my fist” or similar to “knuckle sandwich” and is used in the English language like “kiss my ass”. Basically means you are going to punch said person in the face for being retarded.

Blaine: “Hey, want to go down to the park and make-out like we are the Hanson brothers?”
Nigel: “Hey, want to suckle the knuckle?!”