Green’s Dictionary of Slang

(N.Z.) a mild expletive.

1963		W.H. Pearson Coal Flat 108: You’ve got a blimmin’ cheek, haven’t you?
1988		McGill Dict. of Kiwi Sl. 15/2: blimin bloody or blooming; the kind of mild expletive nobody ever deleted.
2003		McGill Reed Dict. of N.Z. Sl. [as cit. 1988].