A slug is defined as a mass that is accelerated by 1 ft/s2 when a net force of one pound (lbf) is exerted on it.
[2] One slug is a mass equal to 32.17405 lb (14.59390 kg) based on standard gravity, the international foot, and the avoirdupois pound.
[3] In other words, at the Earth's surface (in standard gravity), an object with a mass of 1 slug weighs approximately 32.17405 lbf or 143.1173 N.[4][5] The slug is part of a subset of units known as the gravitational FPS system, one of several such specialized systems of mechanical units developed in the late 19th and the early 20th century.
[6] The name "slug" was coined before 1900 by British physicist Arthur Mason Worthington,[7] but it did not see any significant use until decades later.
per ft./sec.2 or in grams per cm./sec.2.The slug is listed in the Regulations under the Weights and Measures (National Standards) Act, 1960.