Usually said as one word. It's another famous okkerism (Australian slang) meaning, Great mate! Also simply means Thank you for your kind advice and I shall follow through with your proposal. Example: Hey, Boof, the esky's full o' long necks (beer). You'll have ta put them in the tub (bath). And the reply comes, You bonzabeautymate!
BONZA BEAUTY MATE
Meaning of BONZA BEAUTY MATE in English
Slang English vocab. Английский сленговый словарь. 2012