Degradingly erotic reproductive practices, recommended only for the most masochistic, wanton harlots. Subject usually has difficulty walking for like a day.
Shut yo' mouth and open yo' legs, bitch, yo' in for some srs derp.
by usernameunavailable November 09, 2011
From the Online multi-player game, World of Tanks, it refers to the biggest and most explosive slowly reloading gun that one can have for a particular tank.
Hey, do you have derp on that KV tank? No, I have the stock gun. Noob.
by SiemaUSA October 15, 2011
When one is blazed and attempts to leave a party/chief session.
Yo guys, I gotta get home, boutta derp.
by dixon yamada October 01, 2011
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
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
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

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