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Latin masculine 4th-declension noun. Means derp.
Derpus derpuum -- A derp of derps.

E pluribus derpibus unum -- out of many derps, one.
derpus by derpus maximus August 9, 2012
Related Words

derpus majoris 

"oh man, you see that girl over there....she is a derpus majoris!"
derpus majoris by lainabug November 13, 2011

derpus- grande

Largest possible quantity of derpness known to mankind. One who acts in derpus manner of extreme magnitude.
Id say that manuever was derpus- grande; your lucky to be alive!
derpus- grande by Larry Goldsmitz December 26, 2007

derpestrian 

A stupid pedestrian.
- Hits the Walk Signal more than once.
- Crosses without a crosswalk at heavy traffic, usually stranding himself on an "island" for many minutes.
- Has not mastered the art of jaywalking.
- Crosses in front of a car who finally gets a break in the traffic he's been wanting to merge with.
Term can be thought of as DERR-pestrian or fake-German like "der pest-rian."
Motherfuckin derpestrian!! Crossin' however you please just 'cause you know you could sue me if I hit you. Bitch.
derpestrian by Douglas Young November 13, 2007

depussification

1) a process required to remove any for of bitch-assness, (mood swings, not daring, literally having a pussy, bitching out, crying, lack of cursing, unable to have sex, unable to obtain sex, lack of sexual activity, rejection of sexual activity, no pursuit of sexual activity, finishing high school without sexual activity, thinking of a girl for more than sexual activity) in males that don't properly develop into manhood. Usually involves multiple test and a series of beatings and abuse. Process may take up to several years.
Ryan was a virgin super bitch until he underwent depussification. Now his balls drag on the floor.
depussification by Nigga deeskee September 3, 2009

Derpasaurus 

One who says or does too many things that are or relate to derps. the word emphasizes how much the person derps that it theoretically amounts to the size of a dinosaur, therefore it is adequate to address the person as a "derpasaurus".
"Dude, how did you get that question wrong again? you derpasaurus".
Derpasaurus by AuntJemima46 November 23, 2010