| Acronym | Definition |
|---|
| STFU➣Shut the Freak Up (polite form) |
| STFU➣Southern Tenant Farmers' Union |
| STFU➣Super Time Force Ultra |
| STFU➣Say, Thanks for Understanding |
| STFU➣Special Task Force Unit (gaming) |
| STFU➣Short-Term Follow-Up (pharmaceutical study) |
| STFU➣Stop Tickling Furry Unicorns |
| STFU➣Stop Trolling for Unicorns |
| STFU➣Star Trek Federation University |
| STFU➣Scrawny Two-Faced Underling |
| STFU➣Sir, That's Freakin Ugly (polite form) |
| STFU➣Samurai Training Finished Unsuccessfully |
| STFU➣Show Them Fury Unleashed |
| STFU➣Save the Flying Unicorns |