| M4C |
Meet for Coffee |
| M8 or M8s |
Mate or Mates |
| MA |
Mature Audience |
| MAYA |
Most Advanced Yet Accessible |
| MB |
Message Board |
| MBN |
Must Be Nice |
| MBRFN |
Must Be Real F***ing Nice |
| MFD |
Multi-Function Device |
| MfG |
Mit freundlichen Gruessen |
| MFWIC |
Mo Fo Who's In Charge |
| MHBFY |
My Heart Bleeds For You |
| MHOTY |
My Hat's Off To You |
| MIA |
Missing In Action |
| MIHAP |
May I Have Your Attention Please |
| MIL |
Mother-In-Law |
| MILF |
Mother I'd Like to F*** |
| MITIN |
More Info Than I Needed |
| MKOP |
My Kind Of Place |
| MLAS |
My Lips Are Sealed |
| MM |
Market Maker |
| MMHA2U |
My Most Humble Apologies To You |
| MOFO |
Mother F***er |
| MOMPL |
One Moment Please |
| MOO |
Mud, Object-Oriented |
| MOOS |
Member Of The Opposite Sex |
| MOP |
MOment Please |
| MorF |
Male or Female |
| MOSS |
Member(s) Of The Same Sex |
| MOTAS |
Member Of The Appropriate Sex |
| MOTD |
Message Of The Day |
| MOTOS |
Member(s) Of The Opposite Sex |
| MOTSS |
Member(s) Of The Same Sex |
| MSG |
Message |
| MSMD |
Monkey See Monkey Do |
| MSNUW |
Mini-Skirt No UnderWear |
| MTBF |
Mean Time Before Failure |
| MTF |
More To Follow |
| MTFBWY |
May The Force Be With You |
| MTLA |
My True Love Always |
| MTSBWY |
May The Schwartz Be With You |
| MUBAR |
Messed up Beyond All Recognition |
| MUSM |
Miss You So Much |
| MWAH |
the sound of a kiss |
| MWBRL |
More Will Be Revealed Later |
| MYL |
Mind Your Language |
| MYOB |
Mind Your Own Business |
