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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113
derp... is an acronym for
D.Don't
E.Ever
R.Rape
P.Pigs
farmer: HEY!! WHAT DO U THINK YOURE DOING WITH MY PIGS!!
child: I'm rapeing them
farmer: THIS FARM BELIEVES IN DERP
by daxtonizawesome September 11, 2011

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114
durp A silly word to be used in silly context, such as at the end of a stupid joke, to emphasize intentional stupidity or ignorance.
"A durp a durp a durp-de durp!" or
"It's not 6:45, it's quarter to 7:00... DURP!!!!"
by Shitnutz November 20, 2003

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115
Someone who wont get out of your face or your life
Get out of my face you derp
by marzzol July 20, 2010

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116
A word that you say expressing stupidity
You are such a Derp}
by redstoneromel September 30, 2012

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117
When performing a combo on someone online that has one or more Straight Up Jumping Punches and a x-ray in it, in MK9.
GOOD GOD, DID YOU SEE THAT DERP I DID TO THAT GUY?!?!?!

I derped him hard, coach.
by R_X_S_D & T_B_Z_A August 16, 2011

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118
The word derp actually derives from the acronym D.E.R.P which stands for the "Disgruntled Employee Retaliation Program" and is used when you are intentionally causing a job related derp. Derping is considered a verb.

The act of "derping" or "D.E.R.P-ing" can either be physical or verbal in nature and is always done intentionally... or maybe not if you're lucky.
Examples of derping are as follows:

1. Peter, Samir and I took the company car to lunch yesterday and in the act of derping we almost had all four wheels of the car off the ground. It was awesome!!!

2. You hate your job so much that you keep breaking the copy machine intenionally, but of course nobody knows this. ...Unfortunately, this will often lead you to overhear the statement "I hate this printer it never freaking works."

3. Someone hates their job at the Hamburger Hut so much that they like to tell people Hamburger Hut undercooks the beef patties just so people won't eat there.
by meesolab November 14, 2010

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119
Blacking out in the shower
I derped this morning in the shower
by herp derpy ferpy October 18, 2010

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