Green’s Dictionary of Slang

(N.Z.) beautifully, very well.

1953		Sydney Morn. Herald 16 Dec. n.p.: I can talk beaut now.
1969		G. Wyatt Saltwater Saints 105: She danced real beaut, as Danny said, and had a certain flair for challenging looks, which are there to be challenged.
1971		N. Armfelt Catching Up 125: I knew from when you first came that we’d cobber up beaut.
1981		P. Radley Jack Rivers and Me 162: You sang beaut tonight, Muriel. Better’n Maureen.
1982		N. Hasluck Hand That Feeds You 156: ‘Picture frames burn beaut’, he said.