Kyle was a nice and friendly Californian, and a generally well-respected young fellow. But, as he grew up he became somewhat of a large douchebag, showing his panties to everyone and ruining other people's lives. One day, Kyle took a particularly steamy poo in the bathroom, and, being a douchebag yelled; "I'm washing my face, cocksucker!", thinking he was hilarious. But, his one-night stand did not think his steamy-poop-taking-panty-showing-ass was so hilarious. Result; The Mother-Fucker.

having completed a sensitive task the manager said to Jeffrey, "Jeffrey you are The Mother fucker!"

Tyler, you're the motherfucker, why didn't you tell us about you and Ashley.