Originally used during a fit of rage, a scrambled way of saying the phrase "shut the fuck up" now seen as a humorous term to use by the Tuesday Night Meeting crew fro "shut the fuck up."
A very extreme form of shut the fuck up, often abbreviated as UTFS. When used there is no possible comeback and the target must accept defeat no matter the circumstances
Teddy: Matt guess what
Matt: what?
Teddy: UP THE FUCK SHUT
Matt:...fine...you win