STFU backwards, used to put the annoyance into such confusion that s/he automatically ceases talking for a moment to process what you just said.

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

How Yoda sez "shut the fuck up."

When you're in an argument and you're so pissed off at the other person that you're unable to think straight thus letting out a poor execution of an insult

An alternate way of saying "shut the fuck up".

shut the fuck up but spicy