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
The universal replacement for any words.
"dude, stop being such a baby" - "dude, stop being such a derp"

"you've got to be f**king kidding me!" - "you've got to be derping kidding me!"

"did you end up going to the party last night?" - "did you end go going to the derp last d'dd?"
by Derpady Derp August 30, 2011
Symbolizing a retarded face, look, etc., making fun of it.
Im the Joker, Batman! DERP!
by BATMAN DERP February 06, 2011
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
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
Australian. Abbreviation of underpants.
Johnny busted Sarah wearing only her derps.

In summer, I sleep naked apart from my derps.
by spruce_goose June 22, 2005

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