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Shortened Version of "Shut the Fuck up!" Used commonly by people in Britan and England, also on such things like AIM, MSN, and Yahoo Messenger.

Literally, they are telling you to bang that girl more quietly, producing less orgasms. Go bang that person who said STFU with a crowbar in the ass.
Guy: "STFU"
Guy 2: "You go fuck it, or I shove a crowbar up yo hole!"
Guy: "What? Go Rape a bus!"
STFU by W/e March 9, 2005
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STFU by tris penkal September 5, 2008
John: CAN YOU JUST STFU!
Joe: *sends images of food*
stfu by johnsleftnutt July 19, 2021
1. Acronym of the phrase "Shut the fuck up" which is commonly used amongst teenagers and on MSN

2. Acronym of the phrase "Squad the fuck up". It is used the Battlefield game series (Battlefield 1943, Battlefield 2, Battlefield 2142) and is used when one believes there is lack of teamwork when there are no squads. By saying this, people will make squads and improve the teamwork, therefore, making a better chance of winning.
--Example 1--
Kevin: STFU man ur annoying
John: kk Rudd FTW

--Example 2--
Tanman: Squad the fuck up!
John: kk
Tanman:thx
STFU by Tanman123 August 22, 2008
an irrational response to your mother's comments that make more sense than your brain can accommodate
comfortably
"I thought we were going to spend the day together for Father's Day"
"Your Dad has been here all day, he worked in the yard for hours and just went to hit golf balls with your brother, they will be back by six"
"Oh, so I have been here all day, but he can go off with my brother" some more words of unkindness and then:
stfu, i am leaving
ridiculous.
STFU by zzellda June 16, 2008
Sacred Trust of Females United! women rock! women get the job done!
Marianne: "Hey Melissa- you did a great job today"
Melissa: "Looks like you and Eva did a great job today too, Marianne"
Eva, Marianne & Melissa: "STFU !!!"
STFU by Evil Eva August 5, 2008
means Shut the Fuck Up...basically shutting down whoever is talking.
why dont u STFU and go away!
STFU by greg m April 29, 2004