by lilstrudel May 21, 2012

To be inefficient, slow, unable, inexperienced, not working correctly, stupid, naive, etc. A word that usually takes the place of "retarded."
Can be pertaining to a person or a thing.
Can be pertaining to a person or a thing.
I tried to send my essay in via email last night, but my computer was being derpy.
*Friend trips and falls over own feet
You are so derpy sometimes
*Friend trips and falls over own feet
You are so derpy sometimes
by Derpyhoovs July 28, 2011

by LIONwho April 14, 2011

by Terez Slowens November 24, 2015

Derpy - a homicidal rapist usually hailing from Hawaii, often with the intentions of slicing off people's penises and jellifying them for their scorpion overlords.
by Boss Nigger. August 5, 2012

by Rob June 17, 2004

A universal nickname for that really annoying girl that everyone hates. She could be your clingy ex-girlfriend or the girl in your government class that always asks stupid questions. If she's "Derpy" then chances are that everyone you know can find something they hate about her.
"Dude, derpy showed up at my house yesterday, she's so creepy!"
"Are you talking about that blonde chick with the annoying voice? I hate that chick, she gets on my nerves."
"Are you talking about that blonde chick with the annoying voice? I hate that chick, she gets on my nerves."
by thedirtydan May 17, 2013
