[slug] n [ME slugge, of Scand origin; akin to Norw dial. slugga to walk sluggishly] (15c) 1: sluggard
2: a lump, disk, or cylinder of material (as plastic or metal): as a (1): a musket ball (2): bullet b: a piece of metal roughly shaped for subsequent processing c: a $50 gold piece d: a disk for insertion in a slot machine; esp: one used illegally instead of a coin
3: any of numerous chiefly terrestrial pulmonate gastropods (order Stylommatophora) that are found in most parts of the world where there is a reasonable supply of moisture and are closely related to the land snails but are long and wormlike and have only a rudimentary shell often buried in the mantle or entirely absent
4: a smooth soft larva of a sawfly or moth that creeps like a mollusk
5. a: a quantity of liquor drunk in one swallow b: a detached mass of fluid (as water vapor or oil) that causes impact (as in a circulating system)
6. a: a strip of metal thicker than a printer's lead b: a line of type cast as one piece c: a usu. temporary type line serving to instruct or identify 7: the gravitational unit of mass in the foot-pound-second system to which a pound force can impart an acceleration of one foot per second per second and which is equal to the mass of an object weighing 32 pounds
[2]slug vt slugged ; slug.ging (1912) 1: to add a printer's slug to
2: to drink in gulps--often used with down [3]slug n [perh. fr. slug to load with slugs] (1830): a heavy blow esp. with the fist [4]slug vt slugged ; slug.ging (ca. 1861) 1: to strike heavily with or as if with the fist or a bat
2: fight 4b--usu. used in the phrase slug it out