Green’s Dictionary of Slang

(US Und.) supplied with money.

1825		C.M. Westmacott Eng. Spy I 173: If you are not pretty well blunted, the first start will try your wind. [note Blunted – London slang for plenty of money].
1846		Swell’s Night Guide 51: Sall was well blunted, and when she liked to tog, was good for the slips at the Vic. or the Surrey.
1848		Ladies’ Repository (N.Y.) Oct. VIII:37 316/1: Blunted, possessed of money. Blunted crib, a house with money in it.