M & M 

Melts in your mouth not in your hand

M & M: original, peanut, almond, crispy, peanutbutter, minis

M & M by jimboyah September 29, 2005

M & M 

M&M = McDonald's and Motel. Good cheap date is a trip to McDonalds, followed by a trip to the cheapest motel around.

I took Jane out last night for an M & M.

M & M by cheap motel November 5, 2008

M & M 

Abbreviation for marine mattress. Slang term for a woman or guy that only gives up the booty to marines.

“Hey, that new Air Force chick that showed up at the office yesterday is hot.”
“You don’t have a chance dude. She was in my class at the Defense Language Institute, she’s a freaking M & M and a half.”

M & M by Trav October 21, 2004

M & M 

Abbreviation for mutual masterbation. The act of two people manually masterbating each other to climax.

"Did you snack dings last night?"

"Naw, we just M & M d' on each other."

M & M by quintessential saget September 3, 2013

M & M 

A multi colered candy that melts in your mouth, not your hand.

I asked Katherine if i could have a M & M and she said no.

M & M by mothafuka July 20, 2008

M & M 

an acronym for Marine and Men. it signifies the difference between a man who is in the marine corp to a man who is not. it is saying that marine corp men are the toughest in the world

a marine bumper sticker is M & M

M & M by royal marine March 11, 2009

M & M 

The abbreviation for "mooses and Masturation" - the cult responsible for the kidnapping of Elian Gonzalez.
They bought out M&M and printed their abbreviation on small chocolate candies shortly after the kidnapping to divert your thoughts from it.

1. KID: Let's go buy some M & M's daddy!
DAD:They may taste good, but I'll never forget what those bastards did to that poor cuban boy... those bastards.... Here's a dollar. Get me a pack, too.
KID: Thanks daddy.

M & M by Murphy TIts January 30, 2008