| Abbreviation | Definition |
|---|---|
| STI | Smoky Turbo Inevitable |
| STICK | Singing To Idolize Cute Kings |
| STL | Schneider Trained Liar |
| STM | Scanning Talking Microscope |
| STN | Simon The Nullifidian |
| STO | Space Tornado Ogawa |
| STOL | Short Turbulence On Landing |
| STOP | Slow To Observe Police |
| STOP | So Tired Of Paying |
| STP | Stomp The Petroleum |
| STP | Stop Teasing Pollocks |
| STP | Stop Teasing Polocks |
| STP | Stupid Tubby Principal |
| STRESS | School Takes our Rest-time Every Single Second |
| STRESS | Still Trying to Run the Entire Solar System |
| STRT | Secret Team Rocket Two |
| STS | Super Turkey Sandwich |
| STT | Straight To Tape Tom |
| STUART | Society To Undermine Annoy ad Ruthlessly Torment |
| STUDENT | Study,Truthfulness, Unity, Discipline, Energy, Neat and Clean, Treasure. |