SU has 2 meanings
1. What does SU stand for?

Shut up

If you are sick of listening to someone talk online or in texts, send them "SU." It is a quick (though not very polite) way of telling someone to stop talking (or typing).

When do I use SU?

The Internet can be a big, scary, and annoying place. Whether you go to the YouTube comments section, log in to Facebook during an election or pandemic, or just scroll through Twitter at any given moment, you are bound to encounter someone that ruffles your feathers.

Or you may be texting with a particularly cantankerous individual and can no longer handle listening to their opinions. These situations are ripe for "SU" to get the inflammatory individual to stop talking, especially if they are trolling you.

Other ways to get someone to stop talking

SU is just one of many terms to get a person to stop talking, with other options including "S/U," "sh^." Or you could take the more aggressive route and send "STFU," "STHU," or "SUF."


I think we'd all be happier if you'd just SU

When you can't handle anymore

Related Slang


Updated June 30, 2021
2. What does SU mean on social media?

Swipe up

On social sites, like Snapchat and Instagram, people use "SU" to tell others that they can swipe up for more content, whether it be a webpage link or voting on a poll. The acronym became popular in the mid-2010s, as influencers often used it to better engage with followers.

Practically, swiping up is when you physically place your finger on the touch screen of a device when using a social app and tracing up to interact with the prompt. Any social media user may ask followers to interact with their post by swiping up, but it's typically the social media influencers or companies with a plan of increasing follower interaction to make money that use SU.


Do you agree with Kim and Pete's breakup? SU to vote!

Trying to SU

Related Slang


Updated September 27, 2022

SU definition by

This page explains what the acronym "SU" means. The various definitions, examples, and related terms listed above have been written and compiled by the team.

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