ststfu 

When u need to shut that sh**the f*** up like bro u talk all day , and NOBODY cares or gives one fu**

Person : Hey

Me : Ststfu , idc

ststfu by dhdneswuehshshdhs February 19, 2023

SSTFU 

Abreviation for, "Seriously, shut the fuck up."

"...And he said that she said I was a slut!"
"SSTFU."

SSTFU by MeowWoman March 22, 2009

STSMFU 

Shut The Stupid Mother Fuck Up !!

I never claimed it was cool. It's just something I say when I'm a little more pissed off (especially at the phony vatos making up ignorant shit as if a ghetto definition.)

PHILLIP: "Aarghhh, another dick cheese fake ghettoism! STSMFU! Must kill!"

PHIL'S CONSCIENCE: "Chill, Phil."

STSMFU by Chengo Bolemongo October 6, 2006

SCSTFU 

She Can’t Shut The Fuck Up. HCSTFU He Can’t Shut The Fuck Up ICSTFU I Can’t Shut The Fuck Up

It seemed like she was the only one talking, because she has SCSTFU.

SCSTFU by Sa’Fire April 16, 2020

ststsufuckup 

Strangle - Stab - Suffocate - Fuck up

Frank: "Holy fuck I wanna fucking ststsufuckup Bartholomew."

Umi: "Okay"

ststsufuckup by Kaishi Takahashi December 30, 2024