M's 

In 21 savage's song 'bank account' he uses the phase 'M's in my bank account'which is short for millions in my bank account. Infering that he is a millionare and has $8,000,000 in his bank account

Amy: I love being rich
Joe: Same, he both have [M's in our bank accounts.

M's by _itz_amy._ August 21, 2017

M's 

M's is how many millions of dollars you got in your bank account

Person 1: "I got 5 M's in my bank account"
Person 2: "Shut up we all know you work at McDonald's part-time...

"This guy has like 50 M's!"

M's by ComfyPants11 September 29, 2017

m’s 

Usually describes money in meaning “millions”

I got 8 m’s on my credit card

m’s by Ugandan Wae January 11, 2018

M/s 

Short for Master/slave. An extreme form of D/s relationship where the slave voluntarily gives up all personal freedom to the Master or Mistress (or both).The creation of such a relationship is often marked by the giving and accepting of a collar and sometimes by the signing of pseudo-legal ownership documents.

She asked to be set free from their M/s agreement. He has said she can go as long as she finds him a new slave first.

M/s by Tesseract June 29, 2005

m&s 

the perfect shop to go to if you want to find a tory

guy: i love m&s
girl: ew you tory

m&s by kirishimasleftcroc June 11, 2021

M.S

Monkey Scrot

Oh man, have you seen that old guy, he's got a huge M.S

Jay lenno has a M.S on his face

M.S by desmund tootoo July 16, 2010

M.S. 

an abbreviated form of the phrase My Sack. The term M.S. originated in small towns. Lack of energy in speaking the whole phrase being the main identifying factor for its origin.

Get over here and shave M.S.

M.S. by trachlor November 7, 2008