The act of ejaculating onto a plant, and then giving it to someone as a meal.
Man-"Last night I saw Jim herp on a plant, and later his wife was derping it!"

WomanA-"I love herp derping!"
WomanB-"Me too! It's so tasty!"
by CaptainYuri April 6, 2011
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An expression used when a person, or yourself, has done somthing extremely stupid and dopey
Person 1: Dude, I just hit my head on the door.
Person 2: HERP DERP.
by Kommandant November 25, 2009
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When two people from different cultures have an outdoor wedding and the person officiating is Jewish.
That wedding was a total herp derp.
by Jexlar January 8, 2018
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the answer for every physics problem according to idiot hipsters that think they are so cool
Q: What is the force of gravity?
A: herp-derp
Teacher: you're a moron
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Something idiots say. Usually it is supposed to indicate stupidity in somebody else, but the person saying it is usually the dumb one.
by Turbo_Phoenix April 26, 2011
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A phrase said by idiotic morons who think they are cooler then they actually are.
by mmmmmhm October 17, 2010
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A rage face showing expression of dumbness or suprising.
Hey, look, it's the herp derp face!
by superworddude May 17, 2014
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