rapper eminem's old stage name, in rap battles from when he was 12- 14 yrs old, as seen in the movie 8 Mile
by eminemforever January 10, 2011

M=M means Meth And Math Are Equal. It's when you're teacher says "We're Doing Math" but you're actually doing meth. It's not your fault that your teacher smokes. M=M is like saying that you're teacher is saying the truth but their not. DON'T TRUST TEACHERS!
by Whiteamuiian September 19, 2016

Masturbating on the motorway.
Charlie ''Eww Dad, a bird poo'd on my window!!''
Daddy Dave, ''No son, that was just a man M&M'ing. Now shut the fuck up and give Daddy a big a kiss.''
Daddy Dave, ''No son, that was just a man M&M'ing. Now shut the fuck up and give Daddy a big a kiss.''
by hjvfjf uy gil ohil hilo/h February 13, 2014

Not a chocolate candy, it’s a cute ship between Mark and Mikayla. It’s called m&m because both their names start with the letter M. m&m would like to keep this a secret and to not let anyone know other than their close friends.
by ¿ ? January 1, 2019

by lucas1234 December 28, 2005
