A very good looking man. Mostly used within male conversation to point out a good looking man, in a manly fashion (as if to point out competition). Often has a very good sense of fashion and more often than not is jacked/ripped. When describing an oil, one can be referred to as 'oily'.
I was crucifying my guns in the gym the other day, when this colossal oil walked in, just pulling birds with his stare.
Oi chief, oil at 12 o'clock. We may have trouble slamming these birds.