STSU Meaning in Text: What It Really Means (2026 Guide)
STSU stands for “Shut The Stuff Up” a softened, less explicit version of a much stronger phrase people often shorten in text. It’s used to react to something surprising, funny, or hard to believe, similar to saying “no way!” or “stop it!” out loud. Most of the time, STSU is playful rather than genuinely rude,…