What is the meaning of Slug?

Any of many terrestrial pulmonate gastropod mollusks, having no (or only a rudimentary) shell.

A slow, lazy person; a sluggard.

A bullet or other projectile fired from a firearm; in modern usage, generally refers to a shotgun slug.

A solid block or piece of roughly shaped metal.

A counterfeit coin, especially one used to steal from vending machines.

A shot of a drink, usually alcoholic.

A title, name or header, a catchline, a short phrase or title to indicate the content of a newspaper or magazine story for editing use.

The imperial (English) unit of mass that accelerates by 1 foot per second squared (1 ft/s²) when a force of one pound-force (lbf) is exerted on it.

A discrete mass of a material that moves as a unit, usually through another material.

A motile pseudoplasmodium formed by amoebae working together.

An accessory to a diesel-electric locomotive, used to increase adhesive weight and allow full power to be applied at a lower speed. It has trucks with traction motors, but lacks a prime mover, being powered by electricity from the mother locomotive, and may or may not have a control cab.

A black screen.

A piece of type metal imprinted by a linotype machine; also a black mark placed in the margin to indicate an error; also said in application to typewriters; type slug.

A stranger picked up as a passenger to enable legal use of high occupancy vehicle lanes.

A hitchhiking commuter.

The last part of a clean URL, the displayed resource name, similar to a filename.

A hindrance, an obstruction.

A ship that sails slowly.

A block of text at the beginning of a scene that sets up the scene's location, characters, etc.

To drink quickly; to gulp; to down.

To take part in casual carpooling; to form ad hoc, informal carpools for commuting, essentially a variation of ride-share commuting and hitchhiking.

To become reduced in diameter, or changed in shape, by passing from a larger to a smaller part of the bore of the barrel.

To move slowly or sluggishly; to lie idle.

To load with a slug or slugs.

To make sluggish.

A hard blow, usually with the fist.

To hit very hard, usually with the fist.

to swallow, swig, slug, guzzle, draw

to devour, gorge, gulp

to engulf

swallow, swig, draught

sly, cunning

to eat greedily

Source: wiktionary.org