Top Definition
The language in which the ends of certain words and/or syllables are replaced with "-er" to provide an enriching and fulfilling sentence.
"Sclerper derper?"
"Actually, flerper derper skerper, indeed."
作者 Chrilerper 2006年7月22日

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A person who is a dumbass, schmuck etc.
That guy is such a derper, why is he listening to the backstreet boys?
作者 PJisJesus 2007年12月15日

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A herpderper.
Derper is herpin' & derpin' all the ding dong day.
作者 herpderper420 2011年8月18日

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a person who cums too early; or someone who fucks it up, can be used in many different scenarios. refer to example
"Man I really derped that exam"
"He's terrible in bed, such a derper"
or just plain "you fuckin derper!"
作者 harry couter 2008年10月21日

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A non existent word made up by the "smartest" women in the world, shortly thereafter discredited by the smartest man in the world.
Haha yeah you derper
作者 asdfsdagasdgdsagfdgsadfgewasvc 2012年8月10日

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the combo of the Dr. and Pepper in Dr.Pepper derper
man i could use an ice cold derper
作者 mason1991 2008年9月10日

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The Urban Dictionary Mug

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The Urban Dictionary Mug

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

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