Top Definition
Someone who acts carelessly or foolishly, or makes mistakes because of incompetence; a fuckup.
He got drunk and wrecked his car and wracked up over a hundred thousand bucks in property damage? What a doader!
by Alex Garret August 02, 2005
1. (n) - A penis with a HUGE head.

2. (n) - An intrument used in science classes to demonstrate static electricity. It looks like a penis with a HUGE head.
"Oh my god, look at that fucking doader! The head is way to big for the stalk."
by Jolee Bindo May 15, 2005
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