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

A Suffusion of Yellow 

Any number greater than 4.

'The electronic I Ching calculator was badly made. It had probably been manufactured in whichever of the South-East Asian countries was busy tooling up to do to South Korea what South Korea was busy doing to Japan. Glue technology had obviously not progressed in that country to the point where things could be successfully held together with it. Already the back had half fallen off and needed to be stuck back on with Sellotape.'

'It was much like an ordinary pocket calculator, except that the LCD screen was a little larger than usual, in order to accommodate the abridged judgments of King Wen on each of the sixty-four hexagrams, and also the commentaries of his son, the Duke of Chou, on each of the lines of the hexagram. These were unusual texts to see marching across the display of a pocket calculator, particularly as they had been translated from the Chinese via the Japanese and seemed to have enjoyed many adventures on the way.'

'The device also functioned as an ordinary calculator, but only to a limited degree. It could handle any calculation which returned an answer of anything up to "4".'

'"1 + 1" it could manage ("2"), and "1 + 2" ("3") and "2 + 2" ("4") or "tan 74" ("3.4874145"), but anything above "4" it represented merely as "A Suffusion of Yellow". Dirk was not certain if this was a programming error or an insight beyond his ability to fathom, but he was crazy about it anyway, enough to hand over £20 of ready cash for the thing.'

--Douglas Adams, "The Long Dark Tea-Time of the Soul"

A Suffusion of Yellow by fredfoobar August 17, 2009

syfau 

Usually a texted word which means "shut your fat ass up"

yo syfau or I'll slap you silly

syfau by MStang April 22, 2011

syfmu 

short of "shut your fucking mouth up" if it means anything.

usage is like stfu, "syfmu you noob"

syfmu by gezz June 2, 2008

STFFU

An adaptation to STFU, which has included a "fucking" to it. Basically translates to "Shut The Fucking Fuck Up!" Has no real purpose except to emphasize that you want the certain someone(s) to shut up.

Dude1:OMG Wassup dawg!

Dude2:STFFU BITCH!

STFFU by monkeygodkiller January 2, 2009

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!"

SYFFUF by Burn666 January 17, 2008

Syafuck 

A time-honored Malaysian tradition where one fucks up so badly he dragged others into his mess, while he only saved himself in the end and brags about it online.

Steve: "Hey, did you hear the news? Jeff didn't apply for a permit for his event and now all his staff are detained by the authorities!"
Jim: "Yeah, he got his daddy to bail him out and he's spewing shit on Facebook. What a syafuck!"

Syafuck by YeOldeTentacle April 3, 2019