Foot-pound-second Definition

fo͝otpoundsĕkənd
adjective
Designating or of the British, Canadian, and U.S. system of measurement in which the foot, pound, and second are used as the units of length, mass, and time, respectively.
Webster's New World
noun

A unit of mechanical power, equal to that required to raise one pound through a distance of one foot in one second.

Wiktionary