The state of being cross-eyed and generally looking stupid, possibly with some showing of teeth for effect. Being derp can be voluntary or involuntary
You would be derp if you lost your retainer, were perplexed by something etc.
by Daraghderp November 13, 2010
N. 1.Epic fail. An attempt at something of extreme greatness, but an utter fail. Antonym: Herp. 2. An expression used in the act of failing, often an exclamation. 3. The name for someone/thing that has failed.

V. Sucking really hard.
N. 1.
1: That guy ate it so hard on that triple pirouette.

2: I know, right?! What a derp.

N. 2.
1(while belly-flopping into a pool): DERP!

N. 3.
1: You honestly tried to pull off cooking 30 brownies in 20 minutes? You fucking derp.

V.
1: Have you ever herped so hard you derped?
by RadioactivePuppy October 26, 2010
The only word that can cause world peace if used correctly. Only chuck norris knows the correct gesture and accent that will cause this to happen.
hey, your that guy who beat my wife at the bar last night! why did you do that!?" "uhh... herp de derp!"
by RageToast October 23, 2010
Indicating retardation in both speech and thought; incomprehensible guttoral sounds intended as English predominantly spoken in the South. See also Southern Accent
Southerner: "Derp-de-DERP! Twang, twannnggg......"

Northerner: "WTF did he just say???"

Southerner: "Derp-de-DOOOO!!! Heheheh!"

Northerner: "Fuck it, I'll find I-95 on a map. Thanks anyway."
by Buck_Turgidson October 05, 2010
A person who may catch you while you're doing something that you're not supposed to be doing.
Look out! It's a derp! RUN
by MSTJ September 27, 2010
when ones eyes go every which way. Usually dogs such as pugs derp.
whats wrong with your dog? Her eyes are going everywhich way.

dude. shes just derping.
by derpderpdog June 19, 2010
A sexual act where one inserts their tongue into another's anal canal.
"Dude, I totally derpped that girl."

"Wanna derp?"

"We were derpping each other."
by iBanged Zooey November 19, 2013

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