| | PEM | | Privacy Enhanced Mail |
| | PEPSI | | Please Enter p*nis Slowly Inside |
| | PERL | | Practical Extraction and Report Language |
| | PEST | | person who is nuisance |
| | PEST | | Please Excuse Slow Typing |
| | PEUM | | Post Ejaculatory Urinary Misfire |
| | PF | | Personal Favourite |
| | PF&HOMW | | Printed, Framed & Hanging On My Wall |
| | PFM | | pure f**king magic |
| | PFO | | Pissed Fell Over |
| | PFO | | Please f**k off |
| | PFY | | pimply faced youth |
| | pg | | page |
| | pg | | parental guidance |
| | pg | | pretty good |
| | PGP | | Pretty Good Privacy |
| | PGY | | Post Graduate Year |
| | PHB | | Pointy Haired Boss (from Dilbert, i.e., doesn't have a clue) |
| | PHB | | Pointy-Haired Boss |
| | PHLOTE | | Primary Home Language Other Than English |
| | PIAS | | Play It Again Sam |
| | PIAV | | Patience is a Virtue |
| | PIAV | | Personal Interests, Attitudes, and Values |
| | PIBTC | | prevention is better than cure |
| | PICBA | | Personal Injury Caused By Accident |
| | PICNIC | | Problem In Chair, Not In Computer |
| | PIF | | Paid In Full |
| | PIGHSNTS | | people in glass houses should not throw stones |
| | PIM | | Personal Information Manager |
| | PIMB | | pain in my butt |
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