See CASSAN.

1

  EQUAL TO CASH.—Of unquestionable merit. In allusion to the fact that paper currency is largely a medium of exchange.

2

  1835.  HALIBURTON (‘Sam Slick’), The Clockmaker, 1 S., chap. xvi. Though I say it, that shouldn’t say it, they [the U.S. Americans] fairly take the shine off creation—they are actilly EQUAL TO CASH.

3

  TO CASH A PRESCRIPTION, subs. phr. (colloquial).—To get a prescription made up.

4

  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.

5