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luff tackle

American

noun

Nautical.

a tackle having a double block and a single block, giving a mechanical advantage of three or four, neglecting friction, depending on which is the standing and which is the running block.

First recorded in 1690–1700

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023