What is the meaning of slug?

noun

• A projectile that is fired from a gun.
  • synonyms: bullet
• A unit of mass equal to the mass that accelerates at 1 foot/sec/sec when acted upon by a force of 1 pound; approximately 14. 5939 kilograms.
• A counterfeit coin.
• An idle slothful person.
  • synonyms: sluggard
• An amount of an alcoholic drink (usually liquor) that is poured or gulped.
  • usage: "he took a slug of hard liquor"
• A strip of type metal used for spacing.
  • synonyms: type slug
• Any of various terrestrial gastropods having an elongated slimy body and no external shell.
• Boxing) a blow with the fist. (
  • usage: "I gave him a clout on his nose"
  • synonyms: punch, clout, poke, lick, biff

verb

• Strike heavily, especially with the fist or a bat.
  • usage: "He slugged me so hard that I passed out"
  • synonyms: slog, swig
• Be idle; exist in a changeless situation.
  • usage: "The old man sat and stagnated on his porch"; "He slugged in bed all morning"
  • synonyms: idle, laze, stagnate