Noun - The name given to a close friend (aka homie) that is comatose at a party. When your dunny drinks too many roofy Coolattas at a party and can no longer communicate, he becomes a dunster.
Did you see the way that that fat girl made that blacked-out dude lick her beef curtains. What a fucking dunster he is.
by Phuk Bucket June 05, 2006