To be scared and cough at the same time
"Kevin almost died, he started to derp so hard."
by dijoelcuervo December 3, 2020
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We you Accomplish something so stupid, you get hard.
Rednecks get a derp boner when someone says “here, hold my beer!”
by Ink Freak December 31, 2018
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Shot right in the face at close range with a large caliber gun.

2. Made a stupid mistake.
Mike Just got derped with a 12 gauge shotgun.
Aaaaaaaaaaaaaaggggghhhhhhh! I derped!
by When in doubt, C4 March 28, 2016
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1.Pulling A Derps is the act of betraying everyone who was ever nice to you

2.being a zygote
J: Dude did you see what that zygote said?
Caynix: Lmao hes Pulling A Derps
by TheNoNamedNigga September 24, 2019
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