Webster's Revised Unabridged Dictionary · 1913

Top-hamper

Top-hamper , noun

(Nautical) The upper rigging, spars, etc., of a ship.
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