This is used when you need a stronger word to ask someone to shut up.

In fact, the acronym has been changed by the years of usage and is now, a word by itself.

***The word "STFU" is said "STUFU".

So, "Stfu", spelled "Stufu" is said instead of "Shut Up".

But some exceptions occurs when it is employed as a single word instead of a sentence.

For example ; if you say "Stfu" only, it is a sentence meaning "Shut up", but if you say "Shut the stfu", "Stfu" becomes just a word, combined with "shut the", meaning anything stronger than "(shut the) fuck up" or "(shut) up", giving a stronger impact on the sentence.
"Stfu" as a sentence ;

-Annoying dude annoys
-Annoyed dude says : Stfu
-Annoying dude says ; F U

"stfu" as a word in a sentence ;

-Annoying dude annoys
-Annoyed dude says ; Shut the stfu
-Annoying dude says nothing.
-Random dude says ; OMG you really made him Stfu dude!

Stronger impact and better result. Try it for yourself.
by Dodsferd November 21, 2009
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No videos = shut the fuck up. A phrase normally seen in the comments section of Youtube videos, particularly guitar or bass demonstrations. To reply to haters claiming they're better, but have no evidence to prove this on their Youtube channels.
Hater: i cud prbably play dat wid ma cok lozer u suk dik.

Guitarist: No videos = stfu.

by ChucklesMginty September 25, 2008
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The kind of kiss when you want your girlfriend or boyfriend just to shut the fuck up.
He was explaninig to his girlfriend a long boring story so she gave him a STFU kiss.
by brencelj October 10, 2011
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Mk at this point, don't answer this person to be honest. When someone says "Istg or Istg Stfu". Just seriously they, you lose, give up. You're only going to dig yourself deeper by talking
Omg, "Istg Stfu" Can u seriously stop dumbass
by ThatEboyyyyyyy March 9, 2021
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stfu..sherlin? She is the best person you will ever meet! She brings joy into your life and is the best person on the planet! Nobody is better than stfu..sherlin! She is very understanding and loving, also very beautiful and careful with your feelings! She’s a whole miracle, having her in your life must be a blessing.
stfu..sherlin? Oh yea! She’s the best person ever especially when you want to laugh so much that you need to go bathroom! She’s the best person to rely on and is always down for anything! I feel bad for people who don’t a stfu..sherlin in their lives…
by Zoelaganzashouldie July 15, 2022
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Sit Down & Shut the Fuck Up--that is to say, "Be quiet and say nothing else, for you are a n00b and your input is not welcome." Used in internet gaming, especially in MMORPGs as a way to tell new joins to a guild that all they need to do is shut up and follow SOP.
"We raid from 9pm to 12pm (or later) PST. If you have a problem with that, SD&STFU. All guild members must have full resist gear banked, and be on time with the appropriate gear to 90% of all raids. Think that is unfair? SD&STFU...."
by Bill Marcellino October 26, 2006
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