a durp is something you say if you dont have anything else to say

to sport a boner, fly the sail at full mass, rock hard, etc.

A word referring to someone who is stupid. Stupid in a naive, klutzy way. Word originates from sound effects that accompany sluggish, dopey activity, "durp a durp a durp."

The incorrect spelling of "derp".

A word created by Matt Stone and Trey Parker, some time ago starting around the time of cannibal the musical. it is a term of saying something along the lines of "oh shit i am fucking retarded". More people might recognize it the word with the character Mr. Durp whom replaced Chef, and when he would say something stupid would hit himself in the head with a fucking hammer.

Someone who is above the level of a derp but has not reached the level of a supreme dank meme lord.

Durp is commonly used as a way to greet a companion, usually when entering a room. Durp is the natural progression from other such greetings (see below). Also it can be said in approval of an opinion or statement or when showing off about something.
What is up? -> What's up? -> Wassup? -> Waddup? -> Sup? -> Durp?