1. Man, you really need to take a bath, you've been scratching your codsack all fucking day!
2. That bitch sucked my dick, and then she tea-bagged my codsack!
The act of thrusting your hips forward and backward in order to make your codsack flap backward and smack against your ass cheeks, causing a clapping noise.
Person 1: "Dude I totally Codsack Flapped last night!"
Person 2: "Really?! Did it hurt?"
Person 1: "Hell yeah bro!"