What does S/U stand for?

Shut up

When you want to tell a person to shut up when texting or online, you can send them "S/U." Most people consider it impolite so be judicious with who you send it to.

Due to the constant exchange of opinions and trolling that occurs online, there is an endless string of opportunities to use S/U. Examples include griefing gamers, crotchety social media users, and annoying siblings in a family group text.

S/U is just one of many terms to get a person to stop talking. Others include "SU," "sh^," and the vulgar "STFU."


"Haha, I pwnd you in that game."
"Can't u just s/u?"

When that kid just won't s/u

Related Slang


Last Updated: June 30, 2021

S/U definition

This page explains what the acronym "S/U" means. The definition, example, and related terms listed above have been written and compiled by the Slangit team.

We are constantly updating our database with new slang terms, acronyms, and abbreviations. If you would like to suggest a term or an update to an existing one, please let us know!