vague arse

n: An Australian colloquialism that describes a person who finds it difficult to remember important or even general information; typically unaware or unsure of their surroundings; not particularly concerned by any type of crisis, emergency or predicament; and is usually spotted scratching their heads and gazing at the sky.

Woman: Where's the car?
Vague arse: Um... I parked it under a tree... somewhere.
Woman: There's a tree every ten metres you vague arse!