Maxwell Pond, n. — Green’s Dictionary of Slang

Maxwell Pond n.

[proper name of the Maxwell (Sugar) Estate in Barbados. No actual pond, however, has ever been traced]

money gone in Maxwell Pond (n.) (also labour gone in Maxwell Pond)

(W.I.) used to describe money or effort that has been wasted or ‘thrown away’.

1953

cited in Allsopp Dict. Carib. Eng. Usage (1996).