A very potent and empowering phrase that, when strongly communicated, will completely annihilate all forms of idiocy, nuisance and bullshit within one's proximity. Can be directed at a person, thing, text or AI.
Pornographic Popup Ads: *exist*
Me: Shut the fuck up

Stupid e-girl: Hey boo, buy my feet pics for $5!!!!
Me: Shut the fuck up

Me: Alexa, set desk lamp brightness to ten percent
Alexa: Got it, playing despacito

Me: Shut the fuck up

Some kid: *unironically necroposts on my 9 year old comment*
Me: Shut the fuck up
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phrase used to express shock or disbelief at something someone has said; similar to "get outta here" or "you're kidding me"
"Alex got a job making a hundred thousand dollars a year."

"Shut the fuck up! No way!"
by poetwarrior May 21, 2007
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In chat it's used as STFU. the Real world it is used in many ways to shut people up. People who have been pissed off by a particular may constantly say this phrase. People will say the phrase for fun and people will laugh while the other person is in utter embaresment or they laugh as well.
(chat) Tod_is_1337: i t3h 0\/\/|\|5 j005!
Admin: stfu
Tod_is_1337: what the fuck does that mean?
Admin: noob....

(Pissed off) Dickhead: hahahaha!! you suck you suck you suck you suck! i fucked your mum! i fucked her good she squeeled like a..
The pissed off one: SHUT..THE FUCK...UP!!!

(Enjoyment) Daniel: hehe and then the blonde
Steven:Shut the fuck up...you suck

Crowd: <laughs>
by Masamune Date November 15, 2004
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someone wants you to shut up and stay quiet but you didn't listen so you're reminded to shut the fuck up
"i got 0% on my test, did you know my pet, hey my birthday-"
"SHUT THE FUCK UP."
by joanjett February 10, 2021
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Say it when someone be sayin' some dumb shit.
When someone be saying some dumb shit, give em a bombastic side eye, and say,
"Shut the fuck up."
"Shut the fuck up."
"Shut the fuck up."
by P0PPYTPLAYS August 2, 2023
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"ohOHoHo hEy gUyS lOoK aT wHaT mY uRbAN naME saYS, iM hOt aNd cARInG"
"Richard shut the fuck up"
by josh.exe November 25, 2021
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