Mostly used on meme generators to make fun of celebrities. Specifically Miley Cyrus because she herps her derp like yeah.
Nodding mah head like yeah, herpin mah derp like yeah.
by herp ba derp derp July 13, 2010
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1) When someone gets excited playing a card game (ie Monopoly Deal) and spills food on themselves.
Dammit, you spilled food again! What a Derp Mah
by Howwwwww January 11, 2012
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