A derp is the guy in the bright clubby striped shirt who waits in line for 2 hours to get into, well, a club. Granted, it’s nighttime, but the derp still wears the euro-trash sunglasses. The derp has far too much pomade in his hair. On top of this, the derp acts like he is a member of high-society, when in fact the derp is actually just high-maintenance white trash.
let's get out of this bar, it's loaded with derps.
by fycfan#1 March 31, 2005
a stupid act committed by an individual which is regretted in retrospect.
passing out with your shoes off at a party is considered a MAJOR derp
by ferral penguin June 26, 2011
An incurable disease, at least until the introduction of Duck Sauce's "Barbra Streisand" with a combination of yelling "Unf Unf Unf" between two mirrors.
Kindoflike Bloody Mary three times, but this one actually works. 50% of the time.

It is known to afflict a certain Jason Liu's face constantly (See "Jason Liu" for more information)

Commonly associated with "Herp"
DocMo: "Hi what's your name?"
Jason: "Derp"
DocMo: "Barbra Streisand"
Kenja: "UNFUNFUNF"
by kendaninjabinja May 02, 2011
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
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
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
The act of being as stupid as shit from time to time.
Person A: .......
Person B: HEY!
Person A:......
Person B: HEY ARE YOU LISTENING TO ME!?
Person A: Huh!? What!?
Person B: HOLY FUCK YOU ARE SUCH A DERP!
by hatederpingaround December 19, 2012

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