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.

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

by Derpyhoovs July 28, 2011

Flag

Get the Derpy mug.

Derpy

Uncontrollably horny female with a hunger for dick, ready to take it in any hole at anytime.

Did you see that girl brought a 12 pack of condoms with her to the party? "Yea she's real derpy"

by Terez Slowens November 24, 2015

Flag

Get the Derpy mug.

Derpy

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.

Baron Von Muffington is such a Derpy!

by Boss Nigger. August 05, 2012

Flag

Get the Derpy mug.

Derpy

Something that can explain something that is cool or dumb.

1)Man this song is so derpy!
2)Yah, that guy is such a derpy derp!

by Rob June 17, 2004

Flag

Get the Derpy mug.