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)
by Swim-on-and-on-and-on.... September 07, 2012

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A nooby or pointless person, this word can also be meant as a way to say someone is stupid. See noob for the way derp can be meant in video games.
That guy is so derpy. He is totaly a derp, does not even know how to reload
via giphy
by StickmanOfDoom March 13, 2016

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Acting or looking VERY goofy.
Hunter Collard stop being a derp!
by _WIZARD_NINJA_ January 25, 2016

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Someone who is an unintelligent asshole.
He/she is such a derp.
by Sbi_Lynnie January 10, 2016

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Someone with low intelligence, or a stupid decision.
That guy is such a derp.

I just dun derped.
by Stgiga November 11, 2015

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derp.
Mom- did you have a nice day at school?
You- derp.
Dad- did you meet any new friends?
You- derp
by SMURFS July 03, 2015

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Anything and everything. I can mean whatever you want it to be.
Person 1: What a derp.
Person 2: I know, he be derpin.
by whoopwhoopshawhoop95555 June 08, 2011

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1)Some one who is a either a retard or stupid looking

2) Something random to say in a awkward situation
Look at that guy being a derp.

That derp is giving me eye cancer from looking at him.

Person: I'm Bi

Person 2: DERP
by Moosic June 10, 2016

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