| Abbreviation | Definition |
|---|---|
| OMW | Oh My Word |
| OMW | Oh, My Word! |
| OMW | On My Way |
| OMW | On My Way! |
| OMWTS | On My Way To Success |
| OMWTY | On My Way To You |
| OMY | On My Way |
| ON | Oh No |
| ON | Or Not |
| ONG | On God |
| ONNA | Oh No, Not Again |
| ONNTA | Oh No, Not This Again |
| ONS | One Night Stand |
| ONTD | Oh, No, They Didn't |
| ONW | Our-New-World |
| OO | Confused |
| OO | Over and Out |
| OOAK | One Of A Kind |
| OOBE | Out Of Browser Experience |
| OOC | Out Of Character |