When your balls swing to and fro, hitting your grundle and the womans mound when giving her a furious pounding resulting in a a pleasant "shuck-shuck-shuck" sound.
Dude, I was banging this bitch so hard last night she got a savage nut slapping
Female masturbation
Looking a erotic pictures or reading erotic fiction to get yourself wet and then patting the pussy lips or smacking your labia lips.
AKA mat slapping
Girl home alone txt's boyfriend:' Hey babe send me some pornographic pictures of yourself please"
Boyfriend txting back:"Why hun you missing me?"
Girl: "Errr yes missing you lots need to do some mat smacking"
Boyfriend: "What???!!!"
Girlfirend: "masturbating, bean flicking you know Mat slapping!"