A Derpidy Derp 

A man or female that makes dumb decisions and may all around be not smart.

Man Linda was such a derpidy derp in class today.

A Derpidy Derp by InfamousJonah December 16, 2017

Derpity do da 

A phrase used at random! :p

Person 1: derp
Person 2: derp
Person 1: DERPITY DO DA!

Derpity do da by Proshi November 13, 2011

derpily 

Doing things in a derpy fashion.

Did you see that guy eating the corndog, he was eating it so derpily.

derpily by SterlingKerman March 5, 2016

derpity 

The act of stupidity

Stop being so derpity lindsey

derpity by DorcasBrie November 22, 2016

Herpily Derpily 

Fun way of saying herpes, which is a nasty STD that's with you for life.

Situation 1:
Bob: Ew, what's that on your lip?

Ted: I got the herpily derpily

Bob: nasty

Situation 2:
Doc: I'm sorry Mr. Clod but I'm afraid you have the Herpily Derpilies

Mr. Clod: Oh NOE!!

Herpily Derpily by cake_walk March 23, 2010

Derpidoo 

Derpidoo is an exclamation used by your typical derp to express excitement.

Derp 1: Derpidoo! I got the promotion!
Derp 2: Well done Derp! I knew you'd get it!

Derpidoo by TonyBony December 12, 2017