Scooby Douche 

A person who always thinks they have everything figured out, but are usually wrong.

"Dude, I know Kevin is cheating on Lynn; I see him with Michelle ALL the time."

"That's his sister you Scooby Douche!!"

Scooby Douche by Fudgey the Whale August 1, 2009

Scooby Dooby Douchebag 

Someone Who Has A Resemblence To Shaggy From Scooby Doo....Skinny,Beard,Big Shirts

Person 1: Hey Look At Haley Joel Osment!
Person 2: Yeah I Know,Talk About A Scooby Dooby Douchebag

Scooby Dooby Douchebag by pahe July 13, 2010