When a guy/girl randomly chews on a mans penis or genitalia, usually resulting in excess blood, and pain, shortly followed by screaming and even death. Do not under ANY circumstances, perform this action, no matter what.
Matt: Hey dude, my girlfriend gave me a chewychunga last night, and im wicked sore.
Steve: That stinks man.
Tyler: Are you SURE that was your girlfriend ;) ?!....