[ boot-top-ing ]
/ ˈbutˌtɒp ɪŋ /

noun Nautical.

the area between the water lines of a ship when fully loaded and when unloaded.
a distinctive band of paint covering this area.

Origin of boottopping

First recorded in 1760–70; boot1 + topping
Also called boot·top [boot-top] /ˈbutˌtɒp/. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for boot topping

boot topping

noun nautical

the part of a ship's hull that is between the load line and the water line when the ship is not loaded
a coating applied to this part of a ship to remove marine growth
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012