1) The sound of a Brain-fart, usually when a fairly smart person says something that's rather silly by accident or the wrong word or can't think of what to say.

2) Breaking something or crashing into something due to thinking too much.

3) Being silly and not caring what other people think of you. See dork
"It'd work better if you used contrasting colors. No, not contrasting -- Contrasting. Not contrasting! You should use contrast-gah! Do you know what I'm trying to say?"
"Complimentary?"
"Derp! YES! THANK YOU!"

"Did you hear the professor walked into a wall today while working on his latest thesis?"
"Ha! No I didn't. He's such a derp"
by mindthederpface March 28, 2013
Sound simultaneously expressing supreme dorkiness and excitement of boston terriers.
derp, derp, derp (repeat until satisfied)
by BT Supreme January 20, 2011
a totally ridiculous person who abbreviates all their words and says that they have a ghat. popular sayings are nahnahnahnah and wanna die? Derps tend to live in basking ridge. subjects often say wheres ma ghat? they will also ask for qual rides to chip after prac whichs translates to quality ride to chipotle after practice. a list of common abbreviations are garb = garbage, ridic= ridiculous, imposs= impossible, ment= mental
Ridge Hockey Team, Derp Dan
by nyjets28 January 19, 2011
10. Something obvious.
Person #1: What?

Person #2: I love you, that's what. Derp! :P
by Inaia December 18, 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
1: The word that describes a particularly retarded face: A retarded smile, and the eyes pointing in different directions.

2: A word merely used as filler
1: Used in a picture (let's use the megaman image just for the hell of it), derp is the quintessential word for itself. 'Nuff said.

2: Person 1: "So... I'm bored"

*5 minutes later*

Person 1: "Derp..."

Person 2: "Yeah"
by aliatos August 23, 2009
Describes a person who usually adds retarted remarks or statements to a conversation. The speaker is usually mocked and teased afterwards and sometimes forced to wear a DERP HAT and told they are full of Derp or the derp is strong with them
A person spots the obvious during a conversation, everybody then says to the person HURR DERPA, HERPA DERPA HERPA HURR. HERPY DERPY HURR.
by DERPA Herpa April 30, 2009
a stupid joke that you could see a mile away
derp de derp de derpidy derp
by jonnyg August 31, 2006

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