| Abbreviation | Definition |
|---|---|
| NYLON | Now You Look Out Nippon |
| NYLON | Now You've Lost Old Nippon |
| NYPA | Not Your Personal Army |
| NYPD | Nauseous Yaks Patio Department |
| NYPD | New York Police Deniro |
| NYPD | New York Pot Dealers |
| NYPD | Nonstop Yawning Police Department |
| NYPD | Not Your Pre-Madonna |
| NYPD | Now You Pants Down |
| NYPD | Now You Pay Dearly |
| NZT | New Zork Times |
| O | Oddity |
| O1G | Orbán (prime minister of Hungary) Egy Geci |
| O2T | Oxygen Thief |
| OAA | Over Analyzers Anonymous |
| OAP | Oldtimers Against Progress |
| OAS | One Angry Swede |
| OB | Odie's Baby |
| OB | Oh Brian |
| OB | Orange Boy |