A word utterred when one screws up. origin: Matt Stone and Trey Parker in BASEketball. Used as an interjection.
(Imagine a scene where a guy is sniffing a girl's underwear, only to discover it is her mom's) DERP!
โดย Broc 06 มีนาคม 2004
Derp- a caption used on silly pictures such as memes.

A word to say after saying something stupid, or derpy.
A word meaning stupid.
Me: "Did u know that butter is a vegtable!?!"
Hater: "No it not you derp!"
Me: "oh, ok"
โดย TheAllyDerp 07 มีนาคม 2014
As used to describe a person who acts like, well....like a Dumb Egotistical Retrograde Prick. Give 'em a hammer. They'll do the rest.
This guy is a total DERP.
โดย mtnmedic 08 มกราคม 2014
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."
โดย killacam53 25 มีนาคม 2013
A word that can mean many different things; usually negative. It can be a noun, verb and adjective. Synonyms include stupid, retarded, idiotic, idiot, dumb etc...

Variations of the word include derpy, derped, derpette, derpity der hurrrr. Herp is also related to derp and usually follows derp in a derpy interjection. Herping is almost always a verb, and when in combination with derp it does not have to be negative.
Noun: "Wow, that guy is a derp"
Verb: "Wow, that guy just derped everything up"
Adj: "Wow, that guy is derpy..."

Misc examples:
Person A: "Derp de durrrr... herp derp?"
Person B: "Herpity derp hurrr... Derp derp?"
Person A: "Hurrr :/ "
โดย FecesExplosion 24 มกราคม 2013
When you don't know what you're doing, or will do.
GF: What are you doing?
BF: *at home, doing nothing*:Derping it
Gf: Ok, well let me know when you're finished cleaning.
BF*thinking*: Dumb Bitch...She's gonna clean it.
โดย gigamar 01 กุมภาพันธ์ 2012
Someone who thinks that the joke:
"Why did the witch ride her broom?"
"Because her vaccuum was too heavy!"

is worth laughing about.
That Linda is such a derp for laughing at that joke.
โดย Courtney_Elizabeth2013 29 มกราคม 2012

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