| Acronym | Meaning |
| NMH | Not Much Here |
| NMJC | Nothing Much, Just Chillin |
| NMP | Not My Problem |
| NNITO | Not Necessarily In That Order |
| NO1 | No One |
| NOTTOMH | Not Off The Top Of My Head |
| NOYB | None Of Your Business |
| NP | No Problem |
| NRN | No Response / Reply Necessary |
| NUFF | Enough Said |
| NW | No Way |
| OBTW | Oh, By The Way |
| OIC | Oh I See |
| OLL | Online Love |
| OMDB | Over My Dead Body |
| OMG | Oh My God |
| OMG | Oh My Gosh |
| ONNA | Oh No, Not Again |
| OOC | Out Of Character |
| OOTO | Out Of The Office |
| OT | Off Topic |
| OTF | Off The Floor |
| OTOH | On The Other Hand |
| OTT | Over The Top |
| OTTH | On The Third Hand |
| OTTOMH | Off The Top Of My Head |
| P911 | Parent Alert |
| PAL | Parents Are Listening |
| PANS | Pretty Awesome New Stuff |
| PAW | Parents Are Watching |
| PD | Public Domain |
| PDA | Public Display Of Affection |
| PEBCAK | Problem Exists Between Chair And Keyboard |
| PIBKAC | Problem Is Between Keyboard And Chair |
| PIR | Parents In Room |
| PITA | Pain In The Ass |
| PLS | Please |
| PLZ | Please |
| PM | Private Message |
| PMFJI | Pardon Me For Jumping In |
| PMFJIB | Pardon Me For Jumping In But... |
| POAHF | Put On A Happy Face |
| POS | Parents Over Shoulder |
| POTC | Peck On The Cheek |
| POTS | Plain Old Telephone Service |
| PPL | People |
| PU | That Stinks! |
| QL | Quit Laughing |
| QT | Cutie |
| RBTL | Reading Between The Lines |