Green’s Dictionary of Slang

ill, sickly, ailing.

1678		J. Ray Proverbs (2nd edn) 349: We have in our language [...] arsy versy, kim kam, hub bub, crawly mauly.
1864, 1867, 1870		Hotten Sl. Dict.
1873		Sl. Dict.
1955		‘Blackie’ Audett Rap Sheet 18: I began to get a little crawly in my guts.