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An extremely advanced case of derp in which the derper derps beyond the regular constraints of natural derp. This creates an immediate space around the user in which derp is both infectious and prevalent. It is a temporary state, and only lasts for at most 9 hours.
He deterped so hard that everyone in the room lost it and derped until the end of the day.
by TheJigglypuffNinja March 21, 2011