Green’s Dictionary of Slang

cracked up adj.1

[fig. use of SE]

impoverished, destitute.

[UK]Hotten Dict. of Modern Sl. etc.
[UK](con. 1840s–50s) H. Mayhew London Labour and London Poor I 21/2: There’s only very few of them – is ‘cracked up’ (penniless). [Ibid.] III 206: After that they are about cracked up and done.
[UK]Sl. Dict.
[UK]A. Morrison Hole in the Wall (1947) 42: Unsolvent. Cracked up. Broke. Busted, in a common way o’ speakin’.