SYFFUF

SYFFUF is short for "Shut your fucking face, uncle fucker", a commonly used phrase in the USA. It was introduced in 1890 by Pope Gregorius XIV but gained popularity when Matt Stone and Trey Parker used it for a song in their popular television series "South Park".

Aunt: "Bob, you suck!"
Bob: "SYFFUF!"

by Burn666 January 17, 2008

Syffuf

An abbreviation for the term "Shut your fucking face uncle fucka"

Terrence sent the text "syffuf" to Phillip

by SUPERWOGFAN100 September 7, 2025