To be extremely attractive, awesome, and have a huge ego. Can be used positively or negatively. Usually used when talking about one's self because of a gigantic ego. But can be used to describe someone else when other words do not suffice, or for comedic effect.
Mate 1:"Hey bro i got this girl lined up and she is keen for gangies."
Mate 2: "Should i call all the boys, every boy?"
Mate 1: "yea, the more the merrier"
A crazy motherfucker that doesn't give a fuck about anything. He is the creator of anything that uses fuel and has wheels on it! Drift master and petrol head described him best.