The Collaborative International Dictionary of English v.0.48:

Lug \Lug\ (l[u^]g), n. [Sw. lugg the forelock.]
   1. The ear, or its lobe. [Scot. & Prov. Eng.]
      [1913 Webster]

   2. That which projects like an ear, esp. that by which
      anything is supported, carried, or grasped, or to which a
      support is fastened; an ear; as, the lugs of a kettle; the
      lugs of a founder's flask; the lug (handle) of a jug.
      [1913 Webster]

   3. (Mach.) A projecting piece to which anything, as a rod, is
      attached, or against which anything, as a wedge or key,
      bears, or through which a bolt passes, etc.
      [1913 Webster]

   4. (Harness) The leather loop or ear by which a shaft is held
      up.
      [1913 Webster]

   5. (Zool.) The lugworm.
      [1913 Webster]

   6. A man; sometimes implying clumsiness. [slang]
      [PJC]

   Lug bolt (Mach.), a bolt terminating in a long, flat
      extension which takes the place of a head; a strap bolt.


   Lug nut (Mach.), a large nut fitting a heavy bolt; -- used
      especially of the nuts used to attach wheels to vehicles.


   Lug wrench (Mach.), a wrench used to tighten or loosen lug
      nuts, usually a steel rod having a hexagonally shaped
      socket which fits closely over the lug nut; sometimes in
      the shape of a cross, having several such sockets, one at
      the end of each arm, to accommodate nuts of different
      sizes.
      [1913 Webster +PJC]

The Collaborative International Dictionary of English v.0.48:

Lug \Lug\, v. i. [imp. & p. p. Lugged (l[u^]gd); p. pr. & vb.
   n. Lugging (l[u^]g"g[i^]ng).] [OE. luggen, Sw. lugga to
   pull by the hair, fr. lugg the forelock.]
   To pull with force; to haul; to drag along; to carry with
   difficulty, as something heavy or cumbersome. --Dryden.
   [1913 Webster]

         They must divide the image among them, and so lug off
         every one his share.                     --Collier.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Lug \Lug\, v. i.
   To move slowly and heavily.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Lug \Lug\, n.
   1. The act of lugging; as, a hard lug; that which is lugged;
      as, the pack is a heavy lug. [Colloq.]
      [1913 Webster]

   2. Anything which moves slowly. [Obs.] --Ascham.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Lug \Lug\, n. [Etymol. uncertain.]
   1. A rod or pole. [Prov. Eng.] --Wright.
      [1913 Webster]

   2. A measure of length, being 161/2 feet; a rod, pole, or
      perch. [Obs.] " Eight lugs of ground." --Spenser.
      [1913 Webster]

   Chimney lug, or Lug pole, a pole on which a kettle is
      hung over the fire, either in a chimney or in the open
      air. [Local, U.S.] --Whittier.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Lug
    n 1: ancient Celtic god [syn: Lug, Lugh]
    2: a sail with four corners that is hoisted from a yard that is
       oblique to the mast [syn: lugsail, lug]
    3: a projecting piece that is used to lift or support or turn
       something
    4: marine worms having a row of tufted gills along each side of
       the back; often used for fishing bait [syn: lugworm, lug,
       lobworm]
    v 1: carry with difficulty; "You'll have to lug this suitcase"
         [syn: lug, tote, tug]
    2: obstruct; "My nose is all stuffed"; "Her arteries are
       blocked" [syn: stuff, lug, choke up, block] [ant:
       loosen up, unstuff]

Moby Thesaurus II by Grady Ward, 1.0:

94 Moby Thesaurus words for "lug":
   Eustachian tube, anvil, auditory apparatus, auditory canal,
   auditory meatus, auditory nerve, auditory ossicles, auditory tube,
   auricle, basilar membrane, bear, bony labyrinth, buck, carry,
   cauliflower ear, cochlea, conch, concha, conduct, convey, draft,
   drag, draggle, draw, drumhead, ear, ear lobe, eardrum, endolymph,
   external ear, ferry, fly, freight, gawk, hale, hammer, haul, heave,
   hump, incus, inner ear, klutz, lift, lobe, lobster, lobule, looby,
   lout, lubber, lummox, lump, lurch, malleus, manhandle,
   mastoid process, middle ear, oaf, organ of Corti, outer ear,
   oval window, pack, palooka, perilymph, pinna, pull, round window,
   secondary eardrum, semicircular canals, shell, snake, snap, stapes,
   stirrup, strain, take, take in tow, tote, tow, trail, train,
   transport, trawl, troll, tug, twitch, tympanic cavity,
   tympanic membrane, tympanum, vellicate, vestibule, waft, whisk,
   wing, yank



V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

LUG
       Local Users Group


The Free On-line Dictionary of Computing (30 December 2018):

Linux User Group
LUG

    (LUG) Any organisation of Linux users
   in a local area, university, etc., that offers mutual technical
   support, companionship with people of similar interests and
   promotes the use of Linux among computer users generally.

   LUGs often hold Install Fests for the general public, in which
   experienced Linux users explain and supervise the installation
   of Linux on new users' systems.

   (2003-09-14)