| STFU | Save The Faithless Unbelievers 
| Others |
| STFU | Save The Flying Unicorn
| Others |
| STFU | Save The Flying Unicorns
| Others |
| STFU | Save The Forum Unity
| Others |
| STFU | Scrawny Two Faced Underling
| Others |
| STFU | Security Testing For Utilities
| Others |
| STFU | Short Term Follow Up
| Others |
| STFU | Show The Film Urself
| Others |
| STFU | Shreveport Times Forum Unhallowed
| Others |
| STFU | Shut The F*** Up
| Others |
| STFU | Shut the Face Up
| Others |
| STFU | Shut The Fk Up
| Others |
| STFU | Shut The Folk Up
| Others |
| STFU | Shut The Foobar Up
| Others |
| STFU | Shut The Frank Up
| Others |
| STFU | Shut the Freak Up
| Others |
| STFU | shut the FUQ up
| Others |
| STFU | Sit The F*** Up
| Others |
| STFU | Smell The French's Underwear
| Others |
| STFU | Smells like The French Union
| Others |
| STFU | Snap The Farmers Underwear
| Others |
| STFU | So Thankful For U
| Others |
| STFU | Society To Find Unconformities
| Others |
| STFU | Socks Television Fascist Underwear
| Others |
| STFU | Sound Technology Fashion and U
| Others |
| STFU | Southern Tenant Farmers Union
| Others |
| STFU | Southern Tenant Farmers' Union
| Others |
| STFU | Southern Tenant Folk Union
| Others |
| STFU | Southern Texas Fertilizer Unlimited
| Others |
| STFU | Special Transitory Food Unit
| Others |
| STFU | Special Transitory Food Units
| Others |
| STFU | Stand The F*** Up
| Others |
| STFU | Star Trek Federation University
| Others |
| STFU | Steal The Funky Unicorn
| Others |
| STFU | Stealing Turkeys From Uncle
| Others |
| STFU | Stop This Foolish Ululating
| Others |
| STFU | Stop Tickling Fluffy Unicorns
| Others |
| STFU | Stop Tickling Furry Unicorns
| Others |
| STFU | Street Tried Fords Unlimited
| Others |
| STFU | Suit the F*** up
| Others |
| STFU | Super Toga Football Umbrella
| Others |
| STFU | Superior Tactical Fragging Unit
| Others |