noun, slang ·Uncommon ·College level

Definitions

Noun

1. 1
   An English unit of mass equal to 12 slugs (386.088 pounds-mass), that accelerates by 1 inch per second squared (1 in/s²) when a force of one pound-force (lbf) is exerted on it. informal

Etymology

Blend of slug + inch.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.