come down with one's dust

• down with one's dust, come down with the dust, down with the dust

From the (now dated) slang sense of dust meaning ‘money’.

come down with one's dust (third-person singular simple present comes down with one's dust, present participle coming down with one's dust, simple past came down with one's dust, past participle come down with one's dust)

1. (slang, archaic) To pay up, especially in cash; to settle one’s accounts, to lay down one’s money.