As used to describe a person who acts like, well....like a Dumb Egotistical Retrograde Prick. Give 'em a hammer. They'll do the rest.
This guy is a total DERP.
by mtnmedic January 08, 2014
When you don't know what you're doing, or will do.
GF: What are you doing?
BF: *at home, doing nothing*:Derping it
Gf: Ok, well let me know when you're finished cleaning.
BF*thinking*: Dumb Bitch...She's gonna clean it.
by gigamar February 01, 2012
a word to say in place of other words. can be used as any part of speech. it is usually used as an interjection.
guy 1: Aw dude! i blew myself up in minecraft!
guy 2: haha derp!
guy 1: shut up your a derp garrett
guy 2:well your more derpy than anyone i know!
by mwahahaiwillruletheworld December 13, 2011
derp-Interjection

Used when replying to a previous statement that is either 1)irrelevant, 2)unintelligible or 3)pointless.
1) following a conversation that had revolved around riced out cars, Jim adds:
"Does anyone else think that corn dogs looks like rats having sex?"
-DERP!

Jim after smoking weed:

"I woke up, or was I already awake? It doesn't matter because THE CAT WAS STILL sleeping!!! ISN'T that odd?
-DERP

3)The sun hurts eyes!
-DERP!
by DFreshalot September 28, 2011
The universal replacement for any words.
"dude, stop being such a baby" - "dude, stop being such a derp"

"you've got to be f**king kidding me!" - "you've got to be derping kidding me!"

"did you end up going to the party last night?" - "did you end go going to the derp last d'dd?"
by Derpady Derp August 30, 2011
Anything and everything. I can mean whatever you want it to be.
Person 1: What a derp.
Person 2: I know, he be derpin.
by whoopwhoopshawhoop95555 June 08, 2011
Symbolizing a retarded face, look, etc., making fun of it.
Im the Joker, Batman! DERP!
by BATMAN DERP February 06, 2011

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