Green’s Dictionary of Slang

whisky-frisky adj.

flighty.

1782		F. Burney Cecilia (1986) IX 768: But as to talking in such a whisky-frisky manner that nobody can understand him, why it’s tantamount to not talking at all.
1915		M.G. Hayden ‘Terms Of Disparagement’ in DN IV:iii 217: flighty, maggoty. ‘She is too whisky-frisky to make a good wife.’.