a phrase used when someone makes a mistake, or says or does something stupid or ridiculous.
shannon: i wonder what frozen ice cream tastes like... ?

peta: derp
by A+inprocrastination June 07, 2011

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Something you say when:
-Someone does/says somthing stupid
-You'e stuck with a noob (n00b)
-You are stuck doing something absolutely fucking horrible
-You come into contact with derp or anything derpy.
-derpo: What does ice cream taste like?
you: Derrrrrp

-n00b: h3llo r4nd0m p3rs0n wu75^ im d0|ng g00d wu7 @b0u7 ucr@zyp3r$0n
you: y0u $cr3@m!ng DERP 0f@ n00b

-person: go jump in a pool of sharks
you: go fuck yourself with a big stick, you fucking derp!

-derpyperson: you're so herpy-derpy!
you: DERRRRRRRRRP ON YOU, YOU DERPY DERP!
by Polyhedron the Great June 26, 2015

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Dopehead Enjoying Raging Porn
Person 1: What are you doin', hot dawg?
Person 2: Derp.
by Anon9498 May 27, 2015

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South Florida expression: Noun: one who screws up majorly. Verb: to screw up majorly.
Noun: I forgot to kill the cat. I'm such a derp!
Verb: I didn't kill the cat. I derped!
by Colon Farrell March 30, 2015

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noun- A slang phrase to say or include when the topic being discussed is random, funny, or really stupid to the point that it is hilarious.
"I'm publishing this really funny picture of a chicken"
"You should caption it with derp, that will make it at least 5 times funnier!"
by DerpyCoal March 05, 2015

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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!
by Broc March 06, 2004

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a funny looking dumbshit with no swag.
look at this derp
by bigbenji96 July 07, 2015

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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 :/ "
by FecesExplosion January 24, 2013

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