| Abbreviation | Definition |
|---|---|
| OWC | Open With Care |
| OWL | Ordinary Wizarding Level |
| OWP | Only With Pleasure |
| OWP | Ordinary Waiting Period |
| OWR | Oh Wow Really? |
| OWTTE | Or Words To That Effect |
| OWW | Old Worry- Wort |
| OYA | Off Your A** |
| OYA | Off Your Ass |
| OYA | On Your A** |
| OYB | Off Your Butt |
| OYBIT | O You'll Be In Trouble |
| OYC | Okay, Your Choice |
| OYD | Off Your Duff |
| OYE | Open Your Ears |
| OYE | Open Your Eyes |
| OYF | On Your Feet |
| OYL | Online Youth Leaders |
| OYO | On Your Own |
| OYOT | On Your Own Time |