The Collaborative International Dictionary
Top-hamper \Top"-ham`per\, n. (Naut.) The upper rigging, spars, etc., of a ship. [Written also top hamper.]
All the ships of the fleet . . . were so encumbered
with tophamper, so overweighted in proportion to their
draught of water, that they could bear but little
canvas, even with smooth seas and light and favorable
winds.
--Motley.
Douglas Harper's Etymology Dictionary
Wiktionary
n. (context nautical English) The upper rigging, spars, etc., of a ship.
Usage examples of "top-hamper".
Small ships, with comparatively little top-hamper in the way of radar: they had the three Soviet types of radar known to NATO as Hawk Screech, Slim Net and Don, but the aerials were unobtrusive, nothing like the contraptions on bigger ships.