A person who is a dumbass, schmuck etc.
That guy is such a derper, why is he listening to the backstreet boys?
ayon kay PJisJesus ika-15 ng Disyembre, 2007
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."
ayon kay Chrilerper ika-22 ng Hulyo, 2006
A herpderper.
Derper is herpin' & derpin' all the ding dong day.
ayon kay herpderper420 ika-18 ng Agosto, 2011
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
ayon kay asdfsdagasdgdsagfdgsadfgewasvc ika-10 ng Agosto, 2012
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!"
ayon kay harry couter ika-21 ng Oktubre, 2008
the combo of the Dr. and Pepper in Dr.Pepper derper
man i could use an ice cold derper
ayon kay mason1991 ika-10 ng Setyembre, 2008

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