'mm' 

Little devil,
short for Mefisto Monster, rarely used in online forums and chats.

"Ooh, you mean little 'mm'!"

'mm' by Mefisto Monster March 31, 2005

MM. 

Attractive, beautiful and bright girl. She can't even cook a sandwich but she likes cats very much. He keeps about 67 children in the cellar.

there are no examples, MM. is unique

MM. by stocazz0 June 5, 2020

Mm bah 

The sound a drunk person makes while falling down.
It was first used by Justin Hayward Young, the lead signer of The Vaccines.

*drinks a bottle of vodka, falls down*
MM BAH!

Mm bah by molten-sky September 2, 2012

mm GANG 

Mini macaroni gang, the gang that is proud op their small noodle. A mini macaroni is referencing to their genitals. A member of the mm GANG has a small penis and is not ashamed of it.

Jasper: Hey bud, it is nothing to be ashamed of, I'm part of mm GANG. So be proud, and you'll be a member too.
Hamza: Thanks, man, I will be proud and a member of the mm GANG.

Meike: Oh my god, I had a member of the mm gang over last night, I just can't get enough of the mm!
Amalia: Yes it is just the right size, and the confidence in their own body is so hot.

mm GANG by PadreDaddy May 26, 2021

MM Failure 

This is know when a person is attacked by the Mexican Mafia on myspace/facebook game Mobsters. It refers to every time another person makes large claims, but is never backs up their claims.

"The guy is a pure MM failure, he never even attacked me back."

MM Failure by asmocon February 24, 2009

Mm'ing 

Mm'ing is when you and your partner endure sexual intercourse with eachother with both of you resulting in an orgasm

I want to mm you
Mm'ing

Mm'ing by Hickman&Burton January 26, 2015

mm hmm 

a sound that describes the following:

yes'um, ok, yea

mm hmm by Ewan Oglethorpe June 20, 2004