The act when 4 or 5 guys that have let their pubic hair grow for 6 years stand over a girl positioned with her face right underneath the multiple scrotums. The guys then simultaneously shave their pubes, letting them fall onto the lucky girl's face. They then jack off and jizz all over the girls face, making the hair stick, while she screams like Chewbacca. The pubes will ideally stay put until she actually has to shave them off.
Tanner: "Hey Brad, you wanna go to the game with us tonight?"
Brad: "Naw Brah. Me, a couple of friends and my cousin Ralphie are going to go over to Cindy's house and giving her a Chewbacca Bukkake."
Tanner: "That's cool bro. Record that shit."