| Abbreviation | Definition |
|---|---|
| OST | Oh Smoke That |
| OSUT | Ok See You Tomorrow |
| OT | Off Theme |
| OT | Off Topic |
| OT | On Topic |
| OT | Open Topic |
| OT | Other Things |
| OT5 | One True Five |
| OTB | Off To Bed |
| OTB | Off-The-Books |
| OTC | Off Topic Comments |
| OTD | Other Than Dope |
| OTF | n The Floor |
| OTF | On The Floor |
| OTF | Only The Family |
| OTF | Out The Front |
| OTF | The Off Topic Forum |
| OTFL | n The Floor Laughing |
| OTFL | On The Floor Laughing |
| OTFRL | On the Floor Rolling and Laughing |