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"Yes", "I agree" or "I hear you". It mimics the humming sound you make when you nod your head in agreement.
* Hey dude, can I ask you a question?
- mm
* Ok, here goes...
by Krytharn November 19, 2006
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For more than one individual to masturbate whilst in the company of another/others doing the same. MM is an abbreviation of the words mutual masturbation.
by Diddley August 14, 2013
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More a sound than a word.

The oposite of "mhm".
It's negative, like "no", "hell no" or whatever similar.
d1: wanna catch a movie?
d2: m-m
d1: wanna get some food then?
d2: mhm
by Elliken April 20, 2010
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My Mummy

In terms of a lover, future Mother of your children. Often used to subtly declare ones affection for ones relationship with a caring soul. Transcending the stigma of society, without prying eyes being aware of your dedication.
by Mummy'sLittleDevil January 29, 2017
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MULTIPLE MEN SYNDROME-when a woman/girl is juggling 2 or more men at the same time.
symptons-calling out the wrong names during sex,forgetting dates,showing up at the wrong guys house.
Hey girl,why do you look so tired?Its just because I'm suffering from M.M.S,I totally have all the symptoms!...
by Roni Coleman January 18, 2008
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