Top Definition
1) The standard saying given by all Microsoft representatives regarding rumors; stands for "Microsoft does not comment on rumors or speculations"
2) Used in texting or instant messaging as a way of saying "I'm not going to talk about this subject"
Mike (texting John): Dude, did you hook up with Kim last night?

John(texting Mike): MDNCOROS
by Brad T. D. C. March 08, 2008
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