| Abbreviation | Definition |
|---|---|
| UPN | Un-Popular Network |
| UPN | Unrelenting Punishment Network |
| UPS | Ultra Poor Service |
| UPS | Unbelievably Pathetically Slow |
| UPS | Unbelievably Ponderously Slow |
| UPS | Unbelievably Poor Service |
| UPS | Unbelievably Pulverized Shipments |
| UPS | Uncommonly Poor Service |
| UPS | Unequaled Package Smashers |
| UPS | United Poop Smashers |
| UPS | Universally Poor Service |
| UPS | Unmitigated Package Smashers |
| UPS | Un-Predictable Service |
| UPS | Unreliable Postal Service |
| UPS | Unsatisfactory Poor Service |
| UPS | Unusual Pulling System |
| UPS | Unusually Poor Satanosphere |
| UPS | Use Purolator Service |
| UPS | Useless Parcel Service |
| UPS | Useless Poor Service |