stsu

Slang for Shut That Shit Up

Alexis: You don't even know her so you can stop-
Nayeli: Girl I don't care stsu

by UndercoverMademan August 4, 2019

stsu

shut the shit up; more like a sister to stfu...

idiot10: ur so ghey
jeliza: stsu

by JelizaRose March 7, 2008

stsu

Shut the smurf up, used in place of stfu.

Smurf 1: Yeah, I saw you leave with Smurfette.
Smurf 2: Oh man, as soon as we got out of the bar, she started smurfing me.
Smurf 1: Stsu!
Smurf 2: Yeah!
Smurf 1: Right in the Smurfing parking lot?
Smurf 2: Smurf-Yeah!
Smurf 1: Oh! That is freaking Smurf!

by m3h November 5, 2005

STSU

Cousin to STFU; internet acronym standing for Shut That Shit Up

BillyRay6969: dude i can't believe you'd sleep with my girlfriend

GFdoer87: STSU

by tmoney March 22, 2005

Stsu

Shut that shit up

“Like I was saying, Jordan better than LeBron”
“Man stsu!”

by billWecka June 24, 2025

Stsu

Means "shut that shit up" new form of stfu aka "shut the fuck up"

If someone is being annoying on text you type stsu to say stop talking about that stuff or just shut up

by Mikee73_ November 1, 2025

stsu

stsu means shut that shit up

i miss my mannn
girl stsu

by big kayy January 22, 2025