Match Making Ratio. It's a hidden skill rating giving to you by Blizzard's complex rating system. You are never allowed to see it, but it determines "Favored, Teams Even, and Unfavored". It also determines league.
My MMR must be huge, I went from Bronze to Diamond in 3 game

My MMR is bigger than my dick, and my dick's bigger than Mount Everest. 2+2=a big dick.
by DeminRamst February 13, 2011
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Stands for the medical vaccine which prevents measles, mumps, and rubella. "MMR" comes from the first letter of each disease.
Jake received his MMR vaccine as a child.
by cypat25 July 3, 2005
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An onomatopoeia used in written digital social media (WhatsApp, Discord) to denote a positive emotion or a laugh, both ironically and unironically, trough making a long bilabial nasal sound followed by a voiced dental, alveolar and postalveolar trill to end the sound.
It is mostly used by pro-gamers, people who want to scape from Latin-América and V-tuber fans.

It is elite courtesy to respond with another mmr or only mr in case you are in a hurry
Person 1: I fell down my stairs
Person 2: Did it hurt?
Person 1: No
Person 2: mmr

Person 1: My internet does not work.
Person 2: mmr
Person 1: mr
by mmr Man October 23, 2020
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walking up to an asian and saying " mmr".
by AsiAnsFood November 6, 2011
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A radiant player who plays like a headless chicken, runs around staring at the floor and proceeds to bottom frag on your team. However, when they are on the opposite team, they are the rebirth of S1mple and are god tier.
Guy 1: This guy on our team is so bad, he's bottom frag Reyna in Radiant.

Next Game

Guy 1: Bro this is the same bottom frag Reyna from last game hitting all his shots, all these MMR Assassins are making me derank
by burhhrhrhr January 25, 2021
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The A harmless injection given to most infants to protect them from measles mumps and ruebella.

Some (braindead) people believe that this vaccine causes regressive autism in its patients. These people are mainly followers of the holistic medicine movement.

Coincidentally these people are also severely retarded/ the victim of a surprise icepick lobotomy/someone in a coma/madonna/5 times worse than your average paedophile.

So the next time someone espouses their homeopathic, generally incorrect and totally unscientifically founded views on this subject, you would be totally within your rights to paprecut the worlds "Dr wakeman was paid off to make these wild allegations by a firm specializing in beating the fuck out of any medical malpractice for financial gain" onto their chests.
Tanyarrrr: Did you know that the MMR vaccine causes regressive autism? That's why my little Oscar wasn't given it. And now he's absolutely perfect! Apart from that massive lump on his neck, but at least he hasn't got the dreaded autism.

Myself: *Places cup of coffee gently down on table... looks up... advances menacingly... cut to black... piercing scream heard in distance. *
by the_carpenter September 2, 2009
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A player, who, on your team, appears to be lost, runs around staring at the floor, plays like a chicken with their head cut off, proceeds to go 4 and 15, but, flip it around. The MMR ASSASSIN, when they play against you, it looks the the rebirth of s1mple. Their perfect crosshair positioning, you're getting instantly one-tapped from across the map, and just the perfect prediction as to where you are going. That, is the MMR ASSASSIN
Hiko, while playing in the 100 Thieves tournament, was an MMR ASSASSIN.
by kegyrawr January 26, 2021
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