1 definition by aurelius maximus
A person who is incompetent or a mutherfucker. It is someone who is useless to humanity and is wasting the oxygen that a normal person could be breathing, just by being alive and breathing. Originated in Australia.
Person 1: "Bob is a dickhead, he can't get anything right".
Person 2: "Yeah, he's a fucking oxygen thief".
Person 2: "Yeah, he's a fucking oxygen thief".
by aurelius maximus April 13, 2013