| Abbreviation |
Meaning |
| m | Male |
| M$ | Microsoft |
| m.02 | My two cents |
| M/F | Male or female |
| M02 | My two cents |
| m8 | Mate |
| mab | Maybe |
| Macro | Economy management skill |
| Main | Main character |
| mats | Materials |
| MB | My bad |
| MBF | My best friend |
| MBS | Mom behind shoulder |
| MC | Minecraft |
| md@u | Mad at you |
| md@ufn | Mad at you for now |
| MDIAC | My dad is a cop |
| MDPS | Melee damage per second |
| me2 | Me too |
| meds | Medications |
| meh | Whatever |
| Metagame | Outside game preparation and strategies |
| MF | Mother F***er |
| MFB | Mother F***ing B**** |
| MGB | May God bless |
| mgmt | Management |
| mhm | Mm-hmm |
| MHOTY | My hat's off to you |
| MI | Marching Illini |
| MIA | Missing in action |
| MIB | Mint in box |
| MIB | Men in Black |
| MIBG | Mental image be gone |
| Micro | Unit micromanagement skill |
| MIL | Mother-in-law |
| MIMAS | May I make a suggestion |
| min | Minute |
| mins | Minutes |
| MIPS | Millions of Instructions Per Second |
| MIRL | Meet in real life |
| mishu | Miss you |
| mk | Okay |
| mka | Make additions |
| mkay | OK |
| MLIA | My life is average |
| MM | Missing my |
| MM | Merry meet |
| MM | Make me |
| MM | Music Monday |
| MMA | Meet me at |
| MMAMP | Meet me at my place |
| MMB | Message me back |
| MMBBG | Massively Multiplayer Browser-Based Game |
| MMFU | My mate fancies you |
| MMHRD | Many Many Happy Returns of the Day |
| mmk | OK |
| MMO | Massively Multiplayer Online |
| MMOB | Mind my own business |
| MMOG | Massively Multiplayer Online Game |
| MMORPG | Massively multiplayer online role-playing game |
| MMRD | My mind is rolled down |
| mng | Manage |
| mngr | Manager |
| mob | Mobile |
| mod | Modification |
| MOH | Maid of Honor |
| MOH | Medal of Honor |
| Mojo | Attractive talent |
| MOO | My own opinion |
| Moolah | Money |
| morf | Male or female |
| MOS | Mom over shoulder |
| MOTAS | Members of the appropriate sex |
| MOTOS | Members of the opposite sex |
| MOTSS | Members of the same sex |
| MOTU | Mark of the Unicorn |
| MOTU | Masters of the Universe |
| MP | Merry part |
| mp5 | Mana per five seconds |
| MR | Mentally Retarded |
| MRT | Modified Retweet |
| MRU | Most recently used |
| MS | Microsoft |
| Ms | Miss |
| MSB | My sexy b**** |
| msg | Message |
| MST | Must see today |
| MT | Mistype |
| MTF | More to follow |
| MTFBWU | May the Force be with you. |
| MTFBWY | May the Force be with you |
| mtg | Meeting |
| mth | Month |
| MU | Miss you |
| MU@ | Meet you at |
| muah | Kiss |
| MUBAR | Messed up beyond all recognition |
| MUD | Multi-User Dimension |
| mula | Money |
| mum | Mom |
| mut | Mutilate |
| MW | Most welcome |
| mwa | Kiss |
| mwah | Kiss |
| mwahugz | Kisses and hugs |
| MYB | myYearbook |
| MYOB | Mind your own business |
| mysp | MySpace |