| Abbreviation | Definition |
|---|---|
| TIQ | Titans In Quarantine |
| TIR | Trapped In Reality |
| TISM | Tulane Institute of Sports Medicine |
| TIT | Totally Intoxinated Team |
| TIT | Tournament In Texas |
| TIV | Total Immersion Videogame |
| TJ | Team Junior |
| TJ | Tommy John |
| TJ | Torn Jock |
| TJ | Triple Jump |
| TJ | Triple Jumping |
| TJA | Texas Junior Anglers |
| TJB | Troy Junior Baseball |
| TJC | Trick Jump Competition |
| TJF | The Jitsu Foundation |
| TJFA | The Japanese Football Association |
| TJI | Texas Judo, Inc. |
| TJJ | Texas Jiu- Jutsu |
| TJQ | Tai Ji Quan |
| TJR | Team Jolly Roger Bike Club |