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1.
(noun) is a large amount of heavy menstrual blood. It can also be used as an insult towards individuals you do not like.
Example 1:
Guy 1: "Dude worst sex ever last night."

Guy 2: "Why?"

Guy 1: "Bitch unexpectedly had her period and covered me in cuntmuck"

Example 2:
Guy 1: "Tom spilled beer all over my xbox!"

Guy 2: "What a cuntmuck!"
by stpdass20 February 16, 2011