| Abbreviation | Definition |
|---|---|
| MOMO | Mind Of My Own |
| monkaW | monkaS Wide |
| MONTH | Middle Of Nowhere This Happens |
| MOO | My One and Only |
| MOOB | Mind Out Own Business |
| MOODS | Member Of Outstanding Dating Service |
| MOOS | Member Of The Opposite Sex |
| MOP | My Other Persona |
| MOPAR | My Own Personal Adrenaline Rush |
| MOPP | My Online Publication Page |
| MORNO | Morning! |
| MOS | Mom Over Shoulder |
| MOSAD | Most Of Sudden And Deeply |
| MOSS | Member(s) Of the Same Sex |
| MOTAS | Member Of The Appropriate Sex |
| MOTD | Mood Of The Day |
| MOTH | Man Of The Hour |
| MOTH | Managers Of Their Homes |
| MOTHER | Maker Offspring Tits Healed Everything Right |
| MotherOfAll.... | The largest one |