Slug \Slug\, n. [OE. slugge slothful, sluggen to be slothful; cf. LG. slukk low-spirited, sad, E. slack, slouch, D. slak, slek, a snail.]

1. A drone; a slow, lazy fellow; a sluggard. --Shak.

2. A hindrance; an obstruction. [Obs.]

--Bacon.

3. (Zo["o]l.) Any one of numerous species of terrestrial pulmonate mollusks belonging to Limax and several related genera, in which the shell is either small and concealed in the mantle, or altogether wanting. They are closely allied to the land snails.

4. (Zo["o]l.) Any smooth, soft larva of a sawfly or moth which creeps like a mollusk; as, the pear slug; rose slug.

5. A ship that sails slowly. [Obs.]

--Halliwell.

His rendezvous for his fleet, and for all slugs to come to, should be between Calais and Dover. --Pepys.

6. [Perhaps a different word.]

An irregularly shaped piece of metal, used as a missile for a gun.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Slug \Slug\, v. i. To move slowly; to lie idle. [Obs.]

To slug in sloth and sensual delight. --Spenser.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Slug \Slug\, v. t. To make sluggish. [Obs.]

--Milton.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Slug \Slug\, v. t. [imp. & p. p. Slugged; p. pr. & vb. n. Slugging.]

1. To load with a slug or slugs; as, to slug a gun.

2. To strike heavily. [Cant or Slang]

Source: Webster's Revised Unabridged Dictionary (1913)
 

Slug \Slug\, v. i. To become reduced in diameter, or changed in shape, by passing from a larger to a smaller part of the bore of the barrel; -- said of a bullet when fired from a gun, pistol, or other firearm.

Source: Webster's Revised Unabridged Dictionary (1913)