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Ridiculous; Random; Silly usually to describe another person or image.
That picture looks really derpy.
by CJK909 January 13, 2015
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3
adjective

accident prone; perhaps so much so that it makes one look foolish
I've been feeling pretty derpy today. Everything I touch seems to fall apart, and I cannot seem to do anything right.
by Count Schlick February 29, 2012
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5
Clumsy or uncoordinated; prone to cause accidents likely due to some, often humourous, mental lapse.
Ugh, I feel so derpy today. I just filled the coffee maker with pencil shavings and tried to write something down with a coffee bean.
by Count Hieronymus Schlick March 21, 2012
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6
Not "all there in the head"; possibly lacking intelligence or common sense. The wall-eyed background character in "My Little Pony: Friendship is Magic", Derpy Hooves, is named after this.
Hey, look at that guy sticking his aluminum foil-wrapped dick into an electrical outlet. That's derpy if I've ever seen it.

Derpy is best pony.
by datSato December 31, 2011
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7
A disease (perhaps contagious) symptomized by using continuous "derp" actions.
"Man, I think Micheal has derpies."
"I know a few people who certainly have derpies."
by Lsh14 April 27, 2010
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