A sound made whenever you disagree with something or don't like something!
Example 1:

Guy #1: Bro...that one movie, "Land of the Lost," has to be the funniest movie ever

Guy#2: Yermp. I think "The Hangover" is.

Example 2:

Woman: Hey baby, do you like this dress?

Man: yermp. I like that little black one better!
by Kah-Toh November 28, 2009
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