n. one who derps on purpose; a purposeful derper; one who cultivates derping to get out of responsibilities; a form of trolling...
1) Claim you have "no kitchen skills, and clumsiness" to get out of helping with dinner.
2) asking for help with BASIC and obvious life choices
Gabe: "if I want to add something to Urbandictionary, do I click on the "add" tab?"
Missy: "you are such a perper. you are perping. that is so f***ing obvious!!!"