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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113
the definition of the word is not actually known. the tendency of the word to be used is very frequent, however, and usually is used to break awkward silences.
Someone says something stupid...

Carrie - "Yeah Amy, turn on the air conditioner, it will defrost the windows."

(There is an awkward silence, because the last statement was incredibly brainless. Then...)

Mike - "Uhh, derp."
by fifthelement December 10, 2003

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114
derp is the same as lol, except derp can be used in more fail situations
Derp
by ZUhhh August 26, 2009

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115
An akward purple-blue.
...That flower is... a rather akward purple blue..

Derp.

What?

Derp, that's the color.
by Brad Robley July 17, 2009

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116
A word uttered when performing a particularly easy frag in a multiplayer combat game such as halo or unreal tournament.
(Player 1 spots player 2 trying to hide under a set of stairs, facing east. Player 1 approaches from the west and pops player 2's melon with a particularly high-powered weapon.)

Player 2: Aaaahgh...
Player 1: DERP!
by cyomega April 14, 2004

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117
Stupid; retarded in a very funny way
That derp ahh nigga hunta
by KkRuNk March 30, 2008

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118
derp is just a funny noise that can be used to replace pretty much any word.
"Oh man, what a derp."

"I totally derped it on Tuesday."
by Jimy March 30, 2005

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119
Similar to the word snubba derp is a word that can be used for anything and everything.
What the derp did you just do.

Whats a matter to Derpped for you.

Will you derp the hand in that butter.

Derp it till it bleeds.

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