Erpa Derp

A saying, spoken out loud, while acting as a slow or mentally challenged person when someone makes an incorrect action or is unwillingly blind to something obvious.

Guy1: WHERE IS HE!?!?!

Guy2: In front of you in the bushes. ERPA DERP!

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Purple Derp

A purple retard, or a purple mentally challenged person.

There is a purple derp down in Florida.

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Herp Derp

A phrase said by idiotic morons who think they are cooler then they actually are.

HERP DERP. I AM SO HIPSTER.

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Derp

Is a word that describes a particularly retarded face: A retarded smile, and the eyes pointing in different directions aswell as a wierd fraze such as...Derpdy

Normal person: "Hey, whats up?"

Connor White: "Derp herpa flerp merp der gerp"

Normal person: "Speak normal you derpy dick"

Connor White: "DERPPPPPPPP"

Normal Person: "Calm down"

Connor White:"wa"

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meh, derp

Meh, derp means oh screw you i'm not gonna listen to your derpiness.

guy1 meh, derp
guy2 how mean of you!

guy1 just shut up derp
guy2 *cries in a corner*

Ka-derping

The act of being, being with, or being as close as possibly can be, of, or to a Jack.

1; Holy crap, Ka-derping is the most amazing, vigorous, complicated activity ever!

2; Madison is the Ka-derping Queen!

Derp eye

Caused by a lack of masturbation

Krista has derp eye, must have been a while.