| Abbreviation | Definition |
|---|---|
| OOT | Out Of Topic |
| OOT | Out Of Touch |
| OOTC | Out Of The Country |
| OOTD | One Of These Days |
| OOTD | Out Of The Dumps |
| OOTL | Out Of The Loop |
| OOTN | Outfit Of The Night |
| OOTO | One Or The Other |
| OOTO | Out Of The Ordinary |
| OOTP | Outfit Of The Day |
| OOTW | Out Of This World |
| OOYB | One Of Your Best |
| OOYL | Only Once You'll Live |
| OOYM | Out Of Your Mind |
| OP | Octo Pest |
| OP | Original Poster |
| OP | Other People's |
| OP | Over Powered |
| OPAT | One Project At a Time |
| OPC | Operating Peoples Computer |