Also found in: Acronyms.
1. slang An abbreviation of "man for men," signifying oneself as a man who is looking for romantic or sexual interactions with other men. I'm 35, white, M4M. Not looking for anything serious, but open to love.
2. slang An abbreviation of "men for men," used in personal ads and spaces online specifically for men to find or interact with other men in a romantic or sexual capacity. I'm kind of new to the M4M online dating scene, so I'm not sure where to start. We offer one of the safest, most inclusive M4M chatrooms on the Internet.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.