Green’s Dictionary of Slang

crocky adj.

[crocked adj. (2)]

(Aus.) unwell, shaky, ‘under the weather’.

[UK]‘R. Andom’ Neighbours of Mine 243: Yes, it is a bit crocky.
[US]N. Algren Never Come Morning (1988) 198: Some girls make mistakes by not goin’ to school [...] ’n some go so long they get crocky.