Noun. One who is so adept at maneuvering an automobile in a sideways manner, that they could literally package it and sell it to willing customers.
"Mate, Johno is a drift merchant if there ever was one. He spent like two minutes drifting around that round-a-about at the end of Fake St. He was goin so fast, Macca took a puke in the backseat, shit Johno's pissed about it"