- M: The class of a harness racehorse which stands for Metropolitan Assessment. A C11 M6 pacer has won an equivalent of 11 country class races and 6 metropolitan class races.
- m.: An abbreviation for a mare, as it appears in race books, pedigrees and stud books etc.
- Maiden: A horse that has not won a race.
- Mail: Information and tips.
- Mare: A female horse over three years old.
- Market: The list of all horses engaged in a race and their respective odds.
- Mentor: The trainer of a horse.
- Monkey: A term used for five hundred dollars.
- Moral: An absolute certainty.
- Mounting yard: Enclosure where the horses are paraded prior to each race and jockeys mount and dismount their horses.
- Muck lather: Term for a horse sweating profusely, usually brought on by nervousness prior to a race.
- Mudlark: A horse which goes well on a wet track.
Read more about this topic: Glossary Of Australian And New Zealand Punting