a phrase used when someone makes a mistake, or says or does something stupid or ridiculous.
shannon: i wonder what frozen ice cream tastes like... ?

peta: derp
by A+inprocrastination June 7, 2011
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The First Real and proper definition for "Derp" Was basically just a response for if something or someone did something so utterly retarded or screwy, You literally have nothing else to say, Derp is what you say when you have nothing to say.
Your friend super glued a pencil to his shirt so he wouldn't lose it.

You say, "....Derp"
by Founder Of Derp (really!) December 14, 2010
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1- An expression of disdain towards an obvious joke, usually something having to do with slapstick or foolish behavior.

2- To describe a foolish or clumsy individual. One who is blissfully ignorant or unaware of their surroundings.

3- To do something foolish, clumsy, or silly.
1)
Movie Character- "Oh man, I accidentally put laxatives in the Principal's coffee!"

Movie Theater Patron- "DERP!"

2)
John- "Lauren was bringing in the birthday cake, but she couldn't see where she was going so she knocked the houseplant over"

Kelly - "Yeah, she means well, but she's pretty derpy sometimes"

3)
Walt- "I think my favorite Disney character is Goofy. He was derpin' before derp was even a word"
by Max Harley May 3, 2012
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1) A loud interjection used to express a sensual desire

2) The mating-call of a boorish, brobdingnagian Asian in hot pursuit of a harlot.
Person 1: "BE-DERP! BE-DERP! YAAA BOI!!!"
Person 2: Oh man, there must be an Asian home with a vistor.
by sKiTtleZ-TastingDeRainbow January 2, 2008
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Herp da derp derpa derp. A derpity

derpity herpa derp derp. Derp derp

derp. A herp derp herpity derpity derp.
Derp 1: Herp derp?

Derp 2: Derp.

Derp 1: Derpa herp derp derp?

Derp 2: Derp...
by ElTalonO August 30, 2010
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one that expells an action of a complete and total fail
*Person 1 tries to walk up the down escalator*
Person 2: DERP!
by DerpYou February 7, 2010
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1. Normally for those who are witless or stupid.
2. To be scared and coughing at the same time.
A1: "Wow. This dude was derping a ton during his jog!"
B1: "I'm pretty sure that's asthma."

A2: "Wow. This dude was derping a ton during his jog!"
B2: "I'm pretty sure he was an idiot."
by mmmmmmmmmmmmmmmmmh December 4, 2020
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