Someone who's about half-a-step removed from being an asshole, generally because he lacks the mental acuity that assholes usually have.
"We had a tug-of-war in gym today and Bradlick removed his sneakersbeforehand. I guess he was trying to make some kind of a statement... what a doodah."
Doodah is pretty much someone who keeps you going even on your bad days, the reason why you’re still alive, a person who gots you in any situation and the reason you grind so hard every day.