M&M historically for the last half of the 20th century has referred to Mickey Mantle and Roger Maris;the M&M boys; the two famous sluggers on the New York Yankees of the 1950's and 60's; the double M's later became the brand of candy by the same initials.
HolyCow! The M&M boys rocked the old stadium tonight
by Mike McKain March 7, 2006
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A Totally kickass song by Blink182 on their album Cheshire Cat. Written and sung by Mark Hoppus.
hey, have you heard M+M's by Blink182? its such a sweet song!
by PoopAdog April 29, 2006
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Nice melted chocolate covered candy treat with peanuts or plain. Comes in different colors as like blue,green,red ect; Used to eat; or to be eaten off of a person; or nice treat to have when hungry.
Those M&M's were quite a treat
That M&M was good off of you Martinez..
by Racheal Collins December 25, 2005
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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."
by quintessential saget August 1, 2013
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1: Choclate candy.

2: Valium. Any member of the Benzo strand. Pills. (slang)
1: Mom, Can I have some M&M's?

2: Hey Dude, You got any M&M's for sale? (slang)
by Jerry S. October 7, 2006
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gay (short for male & male).
Let's get out of this sausage fest, it's totally M&M in here.
by Nick D April 1, 2003
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Someone who is over weight or fat and appears to be circular like a m&m chocolate candy.
Person 1: Ava is so fat
Person 2: Yeah, she’s a m&m
by B cef June 19, 2019
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