SU Texting Abbreviation

Shut Up

"SU" is a short way to say "Shut Up" in informal writing, especially in texting or chatting online. People use it when they want someone to stop talking or to express surprise, disbelief, or even excitement. It can sound rude depending on how and when it is used, so it should be used carefully.

For example, among friends, someone might say "SU!" in a fun way when they hear surprising news. But in other cases, it might come off as impolite or disrespectful. The tone and context are important to understand what the person really means.