When you are talking and come to someone's dialogue, and you want to sum up what the person said without actually saying it, replace the person's dialogue with this.
Usually used to express anger or disapproval; bitching
Man I got it yesturday. I told my mom I got an F on my report card and she was all like "Durrrrrrrrrr"
Derived from the word der, the extra R's are added for emphasis-- Thus turning the word der for 'obvious', into derrrrrrrrrrrrrrrrrrrrrr meaning a slightly more sarcastic 'WOW that was RETARDED.'
1)In expressing disatisfaction over a situaion:
Derrrrrrrrrrrrrrrrrrrrrr, my dad drank all my Jack Daniels.