Great Barrier Reefer

Someone, originally from New Zealand or Australia, who is very fond of smoking marijuana. (aka, "smoke fi di ganja, maan!)

Surfer Dude #1: Ey might, wonder what's got Steve so spaced out!
Surfer Dude #2: He was hittin' the bong again: That feller is a regular Great Barrier reefer!
Surfer Dude # 1: 'struth, blimey!