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1.
D&M
An emotional conversation usually (but not always) of a melancholy nature. Also known as Deep & Meaningful
Peter and I had a D&M about his troublesome relationship.
by 'K' July 21, 2004
 
2.
Deep and Meaningful.
Sorry buddy, having a D & M with the girlfriend... catch ya later
by Zita December 01, 2004
 
3.
D&M
The act of docking AND munting.

Docking is placing the head of your penis into the foreskin of another man's penis. Munting is find a dead body and having someone (or more than one person) stands on top of it, squishing and forcing out the guts and insides, while the other person goes down on it and slurps up what comes out.
"Last weekend, me and a couple of friends did D&M. We did some docking and munting."
by YoGabbaGabba001 March 12, 2010