Violently thrashing your torso resulting in your arms flinging about and slapping unweary passersby. You must let the movement of your torso fling out your arm, it is not a derp slap if you move your arm yourself.
Maddie and Layne derp slapped each other in spanish class until someone got hurt.
by Zesty Pepper August 18, 2011
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(noun) a fictitious gland responsible for the filtration of derp-worthy stimuli in the human brain.

in a healthy and intelligent individual, it acts as a sensor, indicating when something outrageously stupid has been processed. it tends to result in facepalming, headaches, or sympathetic lulz in defense of knowing that the demise of mankind is imminent.

in an unhealthy or stupid individual, it provides a positive-feedback mechanism, resulting in the individual gaining reward for filling their brain with even more useless bullshit. stimulation of the gland in this type of individual brings about erratic, borderline retarded behavior, and in fact causes them to emanate even more derp to the surrounding environment. this can lead to a derp cascade, which enthralls masses of stupid individuals to do stupid things.
(intelligent) I swear, if I hear another stupid thing come out of her mouth, my derp gland is going to explode!

(stupid) DDDDDDDERRRRRRRRRRPPPPPPPPPPP! NUOH MAH GAWD KIM KARDASHIAN DDDEEEEERRRRPPPPPPPPPP!!!!
by maelstr0m_X1 July 15, 2012
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Someone so caught up in conspiracy theories that they believe everything is a conspiracy.
"You know that the stars at night are fake, right? Everything is a simulation. It's all part of the Matrix "Wake up SHEEPLE!"

"Dude, that is some DERP State talk"
by Talamascaa May 20, 2020
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An overload of derp.
1) Aw man I totally derped out in that exam.
by herpdyderp December 14, 2010
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A botched tit job in which the nipples face drastically different directions.
Sexy Cora was in the process of having her sixth boob job to fix her derp tits, but then she herself derped
by Diobjectica February 2, 2011
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1: A way of saying that something is/sounds stupid. 2: A mean thing to call retarded people.
1: Ya that'll work herp a derp.
2: Haha, look at the herp a derp's helmet.
by That guy over by the icecream November 21, 2010
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The time of night when your thoughts and actions are full of derp.
You forgot what color shirt you were wearing? Must be the derping hour.
by trilbydork August 3, 2012
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