Green’s Dictionary of Slang

jim and joe n.

[ety. unknown; there seems to be no link to the US presidents some of whose heads adorn dollar bills of various denominations; (James Madison appears in portrait of Madison n. but the denomination is too large)]

(US) a dollar.

[US]S. Ford Shorty McCabe 189: He didn’t want much for a starter just [...] a mere matter of ten million francs. ‘No Jims nor Joes?’ says I. ‘The Baron is accustomed to reckoning in francs,’ says Pinckney.