an expression of stupidity (noun)
an act of stupidity (verb)
AJ Fleming loves to say derp; one of his favorite things to say is "Obama derped up the government."
by Avrum F., my fake name March 09, 2012
A literary or spoken phrase that combines elements of "WTF" and "cool story bro". Laced with condescension "derp" is a common form of web-based libel that is almost didactic; however not quite as it is generally a sardonic gesticulation rather than moralistic chastisement. The spoken sense of the world itself conveys an intrinsic feeling of disappointment with a subtle hint of disgust and an overtone of rebuke.
Joel: "I'm a lyrical genius!"
Devon: "Derp."
by Jove Lenod December 06, 2011
From South Park. Originally meant to be said when someone does or says something dumb. Now, said by douchebags and trolls for any reason whatsoever...or sometimes none at all.
John F Kennedy: "Do not pray for easy lives. Pray to be stronger men."

Lindon B Johnson: "Derp."
by GIVEmEEEEEEEEthePower June 11, 2011
when ones eyes go every which way. Usually dogs such as pugs derp.
whats wrong with your dog? Her eyes are going everywhich way.

dude. shes just derping.
by derpderpdog June 19, 2010
one that expells an action of a complete and total fail
*Person 1 tries to walk up the down escalator*
Person 2: DERP!
by DerpYou February 07, 2010
Someone who is generally awkward. Stands around awkwardly and makes everyone around him tense. A derp often is the type that tries to do something cool/risky and fails horribly the first time.
Person 1: "Whoa he managed to crash his dad's car the first time he drove it?"
Person 2: "Yeah, he's a derp."
by killacam53 March 25, 2013
A huge and dramatical case of retardation
Derpy derp derp
by Derps October 26, 2010

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