SU

S.U. (said 'S-U' not 'sue') stands for socially unacceptable. It can be used in many ways but is often used as an exclamation. It describes situations which are akward, tense, or actions which are inappropriate in a given situation, or simply unacceptable according to social norms.

Did you just ask that complete stranger if you have something in your teeth? SU.

That girl is so werid. All I have for here are two words... SU.

by K,K&S April 13, 2007

Sus

An extremely offensive slur used online.

'Sus !!'
'I don't want to speak to you

by Wibbpog March 23, 2021

sus

Suspicous

Red sus, vote them out

by Insane Street November 14, 2020

Sus

Being or acting like a bitch.

Mike: I don’t like her so I took her book.
Derek: nigga you sus asf

by -bitchneega November 3, 2019

sus

when two people of the same gender (typically guys) act like they are dating when they're not.

"bro, Chad and Luke have been acting sus recently"
"nah, dude, they're actually dating"

by barf flavored soda December 15, 2021

Sus

A sketchy/shady person who can't be trusted.

That Foo was acting all sus.

by Minor2supreme May 17, 2016

Su

Usually seen in Snapchat Su in slang means Swipe up and or Shut up
It's seen in. Texting not speech

Example "Su who is this "
meaning, swipe up who is this?

Or
Person 1: did u see Madison's Story??!
Person 2: no, show me
Person 1 k, I'll send u a screen shot
Person 2: SU! SHE GOT A NOSE PIERCING??!

meaning

Shut up! she got a nose piercing?!
Shut up in the way of saying, No way or Omg really?!

by Wizz32 October 6, 2019