when someone does something stupid, weird,"special", odd,
Making a weird face is an example of a derp. (izzy)
by nollidecyrb January 16, 2012
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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
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A simple, undefined reply when an ignorant comment or action is made. Brought to life in the South Park series, when Mr. Derp made a guest apperance at South Park Elementary as the chef for a day, followed by hitting himself in the head with a hammer and exclaiming "Derp!"
I am t0tally c00l3r than 7u n00bs.

Derp.
by crunk nigga holla October 11, 2005
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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 13, 2010
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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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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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A symptom found in gamers that causes them to exhibit - often times retarded - and pointless ignorance or devoid awareness of anything that regards intelligent thinking.
Primer has a serious case of the derps.

Or simply imagine somebody being as close to legally considered mentally handicapped without actually being quite there.
by Str8 Derpin' April 4, 2011
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