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To tell someone that they need to shut their fucking face
You...fucktard...syff.
syff by ja July 1, 2003
Words you can keep
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!"
SYFFUF by Burn666 January 17, 2008
Related Words
SYFFUF syff syffer syffu
Shut your fucking face up.
<CraBYbebeq> u WÝLL die while u r sexing and speaking abt SEX...omg GET LOST THE WORLD!!
<Requiett> Syffu.
syffu by Requiett November 13, 2004
Syffer (adjective)

Syffer is a happy yet depressed person
E. g. I'm feeling syffer today
syffer by -Nay May 13, 2018
An abbreviation for the term "Shut your fucking face uncle fucka"
Terrence sent the text "syffuf" to Phillip
Syffuf by SUPERWOGFAN100 September 7, 2025
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Lookie at these bunch of narps, NARP NARP NARP
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