| Abbreviation | Definition |
|---|---|
| M8 | Mate |
| M8S | Mates (Plural of Mate M8. Internet - Mostly used while Texting acronym) |
| MA | Most Annoying |
| MB | Mighty Busy |
| MBG | Might Be Getting |
| MBH | My Brain Hurts |
| MBS | Might Be So |
| MBY | May Be You |
| MC | Merry Christmas |
| MEGO | My Eyes Glazed Over |
| MFS | Middle finger salute |
| MFW | My Face When... |
| MG | My God... |
| MGMT | Management |
| MIH | Make It Happen |
| MIP | Most Important Person |
| MIRC | Microsoft Internet Relay Chat |
| MM | Mighty Miffed |
| MMI | Me, Myself, and I |
| MMM | Most Monthly Messages |