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Shut the fuck up.

Or, if you're in AP U.S. history, the Southern Tenant Farmers Union.
The AAA told the STFU to STFU
by bishthemighty February 20, 2011
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24
1.Acronym for SHUT THE F*** UP
2.For same thing for u
1.Joe:Hahaha you suck!
Jack:STFU
Joe:No u

2.Remma:Your lookin' hot
Jake:stfu too
by spike09 November 14, 2009
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25
The submission finishing move of John Cena. This hold is known in professional wrestling as the Stepover Toehold Sleeper (STS) and innovated by Masahiro Chono. The wrestler performs a stepover toehold and wraps his arm around the neck of the opponent as in a sleeper hold.
John Cena made Batista tap out when he applied the STFU.
by RGI May 14, 2007
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27
What you tell your boss when he asks the same damn question that you have answered at least 10 times that day!
read the damn memo and STFU Rob!
by The Angry Worker Ant April 14, 2009
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28
As of August 13th, 2009: International Suit Up Day.

STFU stands for "Suit the fuck up." It should be said when someone is not legendary (i.e not wearing a suit.) Should be said to anyone not wearing a suit on International Suit Up Day.
Person A (Wearing a suit) walks up to Person B (not wearing a suit)

Person A: "Dude STFU"
by Syko/Aran August 13, 2009
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