| Acronym | Meaning |
| TDTM | Talk Dirty To Me |
| TDTU | Totally Devoted To You |
| TEOTWAWKI | The End Of The World As We Know It |
| TFDS | That Is For Darn Sure |
| TFH | Thread From Hell (internet Forums) |
| TFLMS | Thanks For Letting Me Share |
| TFMIU | The F*cking Manual Is Unreadable |
| TFN | Thanks For Nothing |
| TFN | Til Further Notice |
| TFS | Thanks For Sharing |
| TFS | Three Finger Salute |
| TFTHAOT | Thanks For The Help Ahead Of Time |
| TFTT | Thanks For The Thought |
| TFX | Traffic |
| TGAL | Think Globally, Act Locally |
| TGGTG | That Girl / Guy Has Got To Go |
| TGIF | Thank God It's Friday |
| THKS | Thanks |
| THX | Thanks |
| TIA | Thanks In Advance |
| TIAIL | Think I Am In Love |
| TIC | Tongue In Cheek |
| TIGAS | Think I Give A Sh*t? |
| TILII | Tell It Like It Is |
| TINWIS | That Is Not What I Said |
| TISC | This Is So Cool |
| TISL | This / That Is So Lame |
| TISNC | This / That Is So Not Cool |
| TISNF | That Is So Not Fair |
| TISNT | That Is So Not True |
| TK | To Come |
| TKU4UK | Thank You For Your Kindness |
| TLA | Three Letter Acronym |
| TLC | Tender Loving Care |
| TLGO | The List Goes On |
| TLITBC | That's Life In The Big City |
| TLK-2-U-L-8-R | Talk To You Later |
| TLK2UL8R | Talk To You Later |
| TM | Trust Me |
| TMA | Too Many Acronyms |
| TMI | Too Much Information |
| TMIY | Take Me I'm Yours |
| TMTOWTDI | There's More Than One Way To Do It |
| TNA | Temporarily Not Available |
| TNC | Tongue In Cheek |
| TNT | Till Next Time |
| TNTL | Trying Not To Laugh |
| TNX | Thanks |
| TOBAL | There Oughta Be A Law |
| TOBG | This Oughta Be Good |