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The noise or sigh you make when you cum. Generally believed to be unique for each person.
Everytime we have sex, your cumgrunt sounds like our dishwasher when it starts.
by iwillcallsecurity June 29, 2009
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2
The disturbing sound of hearing your housemates finish through the paper thin walls of your student accommodation.
ah man, I heard 2 solid minutes of Alex's cum grunts last night. Not cool.
by shitface1234567890 December 11, 2018
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