Verb.
To grin retartedly and/or drool while surrounded by extreme awesomeness because you can not express your joy/excitement/admiration for what ever that is around you with words.
Derived from the words "herp," meaning epic win, and "derp" meaning moment of retardation(according to some definitions).
Commonly occurs when listening to music or watching movies.
A:"So how was that Apocalyptica concert?"

B:"It had me derping in herps!"

A: "Lucky bastard."
by todellisus May 25, 2011
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The opposite of Herp De Derp. Something you say to counter Herp De Derp.
Man - I just banged your mom
Woman - Herp de derp
Mom - Derp du herp.
by DerpMaster1234 November 22, 2011
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