To have a retarded face, or expression causing others to find it funny, creepy or just plain stupid.
Ex. 1 Jennifer Lawrence is the queen of derp because of the faces she makes.

Ex. 2 "I'm bored."
"Me too."
*Awkward silence.*
"Derp."
"Yeah..."

Ex. 3 Jennifer Lawrence Queen of Derp trended on Twitter worldwide. (FACT)
بواسطة Swim-on-and-on-and-on.... سبتمبر/أيلول 7, 2012

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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!
بواسطة Colon Farrell مارس/آذَار 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!"
بواسطة DerpyCoal مارس/آذَار 5, 2015

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Making a stupid face
William made a derp face
بواسطة xmilisnotonfirex فبراير/شباط 19, 2015

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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."
بواسطة Avrum F., my fake name مارس/آذَار 9, 2012

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a person who acts strange,weird, and/or random, usually quite fun to be around due to the fact that this person is an oddball and does and/or says interesting things.
derp: -randomly shouts in the middle of the sidewalk- "Who put this beaver in my pillowcase!!!!"

-friends laugh and giggle-
بواسطة chaosweapon1 مارس/آذَار 12, 2011

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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 :/ "
بواسطة FecesExplosion يناير/كانون الثّاني 24, 2013

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1, an exclaimation made after a moment of incredible stupidity or massive failure.

2, a facial expression with crazy eyes and a stupid lip.

3, when accompanied by a " :3 " indicates happy moment, or blushing with out making the user feel as stupid as they would if they wrote *blush*
guy 1 "she's fiiiiiiine, think I'll get any tonight?"

guy 2 "she's a lesbian."

*derp*
بواسطة omnomnomkittiez يناير/كانون الثّاني 8, 2011

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