1, an exclaimation made after a moment of incredible stupidity or massive failure.

2, a facial expression with crazy eyes and a stupid lip.

3, when accompanied by a " :3 " indicates happy moment, or blushing with out making the user feel as stupid as they would if they wrote *blush*
guy 1 "she's fiiiiiiine, think I'll get any tonight?"

guy 2 "she's a lesbian."

*derp*
av omnomnomkittiez 8 januari 2011
a stupid person, or action
"Danny, your being a huge derp right now.
av MrSexy282 21 maj 2010
one that expells an action of a complete and total fail
*Person 1 tries to walk up the down escalator*
Person 2: DERP!
av DerpYou 7 februari 2010
1: The word that describes a particularly retarded face: A retarded smile, and the eyes pointing in different directions.

2: A word merely used as filler
1: Used in a picture (let's use the megaman image just for the hell of it), derp is the quintessential word for itself. 'Nuff said.

2: Person 1: "So... I'm bored"

*5 minutes later*

Person 1: "Derp..."

Person 2: "Yeah"
av aliatos 23 augusti 2009
A sexual act where one inserts their tongue into another's anal canal.
"Dude, I totally derpped that girl."

"Wanna derp?"

"We were derpping each other."
av iBanged Zooey 19 november 2013
A word that means pretty much nothing. Something to say when there is nothing to say. It goes with the word Herp which is essentially the same thing.
Mayumi: Derp
Yuuma: I am going to make "derp" into a real word!
People watching: Herp Derp
av Mayumi Bloodraine 10 juli 2012
a person who acts strange,weird, and/or random, usually quite fun to be around due to the fact that this person is an oddball and does and/or says interesting things.
derp: -randomly shouts in the middle of the sidewalk- "Who put this beaver in my pillowcase!!!!"

-friends laugh and giggle-
av chaosweapon1 12 mars 2011

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