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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 03, 2005
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an american high school in canada where preference is given to jocks and snobs

mmr to only date the popular crowd
oh you don't stand a chance with her she so mmr
by billy w. April 07, 2004
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