See CASSAN.
EQUAL TO CASH.Of unquestionable merit. In allusion to the fact that paper currency is largely a medium of exchange.
1835. HALIBURTON (Sam Slick), The Clockmaker, 1 S., chap. xvi. Though I say it, that shouldnt say it, they [the U.S. Americans] fairly take the shine off creationthey are actilly EQUAL TO CASH.
TO CASH A PRESCRIPTION, subs. phr. (colloquial).To get a prescription made up.
1890. The Scots Observer, p. 399, col. 2. The Socialist, with an ear for Ibsen, and an eye for Wagner, and a PRESCRIPTION in his pocket that only needs TO BE CASHED for the world to forget its past, and belie its present, and bedevil its future.