The Collaborative International Dictionary of English v.0.48:

Hog \Hog\ (h[o^]g), n. [Prob. akin to E. hack to cut, and
   meaning orig., a castrated boar; cf. also W. hwch swine, sow,
   Armor. houc'h, hoc'h. Cf. Haggis, Hogget, and
   Hoggerel.]
   1. (Zool.) A quadruped of the genus Sus, and allied genera
      of Suid[ae]; esp., the domesticated varieties of Sus
      scrofa, kept for their fat and meat, called,
      respectively, lard and pork; swine; porker;
      specifically, a castrated boar; a barrow.
      [1913 Webster]

   Note: The domestic hogs of Siam, China, and parts of Southern
         Europe, are thought to have been derived from Sus
         Indicus.
         [1913 Webster]

   2. A mean, filthy, or gluttonous fellow. [Low.]
      [1913 Webster]

   3. A young sheep that has not been shorn. [Eng.]
      [1913 Webster]

   4. (Naut.) A rough, flat scrubbing broom for scrubbing a
      ship's bottom under water. --Totten.
      [1913 Webster]

   5. (Paper Manuf.) A device for mixing and stirring the pulp
      of which paper is made.
      [1913 Webster]

   Bush hog, Ground hog, etc.. See under Bush, Ground,
      etc.

   Hog caterpillar (Zool.), the larva of the green grapevine
      sphinx; -- so called because the head and first three
      segments are much smaller than those behind them, so as to
      make a resemblance to a hog's snout. See Hawk moth.

   Hog cholera, an epidemic contagious fever of swine,
      attended by liquid, fetid, diarrhea, and by the appearance
      on the skin and mucous membrane of spots and patches of a
      scarlet, purple, or black color. It is fatal in from one
      to six days, or ends in a slow, uncertain recovery. --Law
      (Farmer's Veter. Adviser.)

   Hog deer (Zool.), the axis deer.

   Hog gum (Bot.), West Indian tree (Symphonia globulifera),
      yielding an aromatic gum.

   Hog of wool, the trade name for the fleece or wool of sheep
      of the second year.

   Hog peanut (Bot.), a kind of earth pea.

   Hog plum (Bot.), a tropical tree, of the genus Spondias
      (Spondias lutea), with fruit somewhat resembling plums,
      but chiefly eaten by hogs. It is found in the West Indies.


   Hog's bean (Bot.), the plant henbane.

   Hog's bread.(Bot.) See Sow bread.

   Hog's fennel. (Bot.) See under Fennel.

   Mexican hog (Zool.), the peccary.

   Water hog. (Zool.) See Capybara.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Hog \Hog\, v. t. [imp. & p. p. Hogged; p. pr. & vb. n.
   Hogging.]
   1. To cut short like bristles; as, to hog the mane of a
      horse. --Smart.
      [1913 Webster]

   2. (Naut.) To scrub with a hog, or scrubbing broom.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Hog \Hog\, v. i. (Naut.)
   To become bent upward in the middle, like a hog's back; --
   said of a ship broken or strained so as to have this form.
   [1913 Webster]

WordNet (r) 3.0 (2006):

hog
    n 1: a person regarded as greedy and pig-like [syn: hog,
         pig]
    2: a sheep up to the age of one year; one yet to be sheared
       [syn: hog, hogget, hogg]
    3: domestic swine [syn: hog, pig, grunter, squealer,
       Sus scrofa]
    v 1: take greedily; take more than one's share

Moby Thesaurus II by Grady Ward, 1.0:

81 Moby Thesaurus words for "hog":
   adopt, appropriate, arrogate, assume, barrow, belly-god, boar,
   careerist, colonize, conquer, cormorant, corner, egotist, engross,
   enslave, forestall, fortune hunter, gilt, glutton, gorger, gormand,
   gormandizer, gourmand, gourmandizer, greedy eater, greedygut,
   greedyguts, guttler, husky eater, indent, individualist,
   jump a claim, lone wolf, loner, make free with, make use of,
   monopolist, monopolize, narcissist, occupy, overrun, pig, piggy,
   piglet, pigling, porker, preempt, preoccupy, prepossess, razorback,
   requisition, road hog, self-advancer, self-pleaser, self-seeker,
   self-server, shoat, sit on, slattern, sloven, slut, sow, squat on,
   subjugate, suckling pig, swine, take all of, take it all,
   take over, take possession of, take up, temporizer, tie up,
   timepleaser, timeserver, trencherman, trencherwoman, tufthunter,
   tusker, usurp, wild boar



The Jargon File (version 4.4.7, 29 Dec 2003):

hog
 n.,vt.

    1. Favored term to describe programs or hardware that seem to eat far more
    than their share of a system's resources, esp. those which noticeably
    degrade interactive response. Not used of programs that are simply
    extremely large or complex or that are merely painfully slow themselves.
    More often than not encountered in qualified forms, e.g., memory hog, core
    hog, hog the processor, hog the disk. ?A controller that never gives up the
    I/O bus gets killed after the bus-hog timer expires.?

    2. Also said of people who use more than their fair share of resources
    (particularly disk, where it seems that 10% of the people use 90% of the
    disk, no matter how big the disk is or how many people use it). Of course,
    once disk hogs fill up one filesystem, they typically find some other new
    one to infect, claiming to the sysadmin that they have an important new
    project to complete.


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

hog

    A term used to describe programs, hardware or people that
   use more than their share of a system's resources, especially
   those which noticeably degrade interactive response.

   The term is usually qualified, e.g. "memory hog", "core hog", "hog
   the processor", "hog the disk".  E.g. "A controller that never
   gives up the I/O bus gets killed after the bus-hog timer
   expires."

   User also hog resources, particularly disk, where it seems that
   10% of the people use 90% of the disk, no matter how big the disk
   is or how many people use it.  Once a disk hog fills up one file
   system, he typically finds a new one to consume, claiming to the
   sysadmin that they have an important new project to complete.

   (2014-08-16)


The Devil's Dictionary (1881-1906):

HOG, n.  A bird remarkable for the catholicity of its appetite and
serving to illustrate that of ours.  Among the Mahometans and Jews,
the hog is not in favor as an article of diet, but is respected for
the delicacy and the melody of its voice.  It is chiefly as a songster
that the fowl is esteemed; the cage of him in full chorus has been
known to draw tears from two persons at once.  The scientific name of
this dicky-bird is _Porcus Rockefelleri_.  Mr. Rockefeller did not
discover the hog, but it is considered his by right of resemblance.