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1. stfu
March 9, 2011 Urban Word of the Day
1) Acronym used for the phrase "shut the fuck up" for efficiency reasons.
Please stfu because I am trying to read.
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2. stfu
A way of saying "shut the fuck up", instead of actually typing it. Has less meaning than actually typing "shut the fuck up", and is often said by people that are losing an argument or can't think of a comeback.
Guy A: "You just contradicted yourself. Twice."

Guy B: "faggit"

Guy A: "Yeah, that's what I thought, you can't think of anything, loser."

Guy B: "stfu"

Guy C: Just admit you lost, Guy B.
by Arch0wl May 16, 2005 share this add a video
3. stfu
Southern Tenant Farmers' Union (STFU): Large labor union, formed in Arkansas in 1934, which lobbied the federal government for better New Deal reforms. Dissolved in 1960. Commonly causes mirth among US History students who are aware of the acronym's double meaning.
Teacher: Joey will you please tell the class about the STFU?

Class: Hahahahahahahahaha
by jer Feb 24, 2005 share this add a video
4. stfu
Shut the fuck up. It's simple. When you are annoyed with someone who won't stop ranting on instant messaging, you type "stfu!!" But be sure to limit yourslef to two exclamation points, though, because three will look too angry. You could also type two exclamation points and then a "1". Like this: stfu!!1. This way, the third exclamation point is there, but only in spirit. This puts a little extra anger, but not so enough to make the other person angry at you. :)
~On instant messaging~

like_totally_cheergrl07: like omg omg omg we like totally had so much crap to do today in like science because the teacher is like so bitchy and she doesn't get that I have a life! I mean COME. ON. Wtf???!!!
xXxmy_heart_bleeds_blackxXx: stfu!!1
5. stfu
Shut The Fuck Up Commonly Used Online Or In Games Online
"Dude that's annoying as hell STFU"
6. stfu
online text-speak for "shut the fuck up".
Perez Hilton needs to stfu immediately.
7. STFU
a widely-used acronym for "shut the fuck up"
Have a nice cold glass of shut the fuck up!
by Phishr Jul 20, 2005 share this add a video