slug

SLUG, n. [allied to slack, sluggard.]

1. A drone; a slow, heavy, lazy fellow.

2. A hinderance; obstruction.

3. A kind of snail, very destructive to plants, of the genus Limax. It is without a shell.

4. A cylindrical or oval piece of metal, used for the charge of a gun.

SLUG, v.i. To move slowly; to lie idle.

SLUG, v.t. To make sluggish.