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 February 24, 2005
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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
by Cexy October 14, 2007
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"Stop Trolling For Unicorns": a phrase coined by youtuber wickedshrapnel from his "This gun f-ing sucks" videos. This was originally made as a response to when he would make a tgfs video on a gun that someone thinks the opposite way about the gun and would decide to post an annoying comment on how the gun does NOT suck.
youtuber1:" OMFG THE HK21 DOES NOT SUCK IT IS BEASTLY YOU'RE JUST A FAGGOT WHO CAN'T USE THE GUN!!!!"

youtuber2: "will you stfu, you must have no life."
by sirkd0202 September 18, 2011
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Acronym for shut the fuck up. Commonly used by bad-ass kids on sites that filter inappropriate language, such as Club Penguin, Pandanda, Runescape and Stardoll.
Also incorporated by lazy typers who can't be bothered to find the hut he uck p on the keyboard.
Kid: "I like Highschool Musical :)"
Bad-ass kid: "Dude, stfu. No-one gives."
by jill04 March 21, 2012
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It is a mysterious abbreviation that is apparently very offensive because everytime you ask they'll tell you to shut the fuck up. So it is essential to avoid asking for the meaning of the abbreviation.
"Oi Johnny what does stfu mean?"
"Shut the fuck up, mom"
by jugojugojugo April 12, 2020
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means you should shut the fuck up, or more simpler, be quiet.
Olivia: "hey guys guess what i go-"
jay: "stfu you goofy ass hoe no one cares the fuck🤣🤣🤣🤣🤣🤣"
by fresh tbh January 23, 2022
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acronym for suck that f*cking uterus; an expression of disbelief/annoyance or just someone who has a really weird kink.
person a:"guess who got a raise"
person b:"what!? STFU!"
person a:"only if you suck mine ;)"
person b:" already on my way ;)"
by smartereveryday October 12, 2019
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