Somebody who is habitually slow and stupid or so disorganized that he causes considerable inconvenience to others. Persons with this disability are invariably male, often adolescent, and never female.
He's just a dopey cunt. He thought Australia was near Germany and that 'Ireland' was spelt 'Island'.
The dopey cunt lost his passport so his parents were running around like headless chickens trying to find it before the flight left.