| Abbreviation | Definition |
|---|---|
| MTGO | Magic The Gathering Online |
| MWF | Married White Female |
| MYG | Mellow Yellow Getup |
| NAKKTK | Nice Anti-Ku Klux Troll Klan |
| NAMCO | Nintendo Arcade Many Character Options |
| NANL | No Anime No Life |
| NASEER | Dwellers of the North |
| NAVGCP | Nice Anti-Video Game Cartoon Police |
| NCRB | National Crimes Records Bureau |
| NGA | New Gen Anime |
| NIB | National Information Board |
| NIOB | New in Open Box |
| NJB | Not Just Bikes |
| NMC | New Member Chat |
| NMFG | New Message From God |
| NNHSBC | National Nursery Home School Board Cricket |
| NNHSBC | National Nursery Home & School Board Cricket |
| NOL | Neighborhoods On-Line |
| NRB | Nauha Room of Beighs |
| NRFM | No Room For Magic |