Source : Webster's Revised Unabridged Dictionary (1913)

Sling \Sling\, v. t. [imp. {Slung}, Archaic {Slang}; p. p.
   {Slung}; p. pr. & vb. n. {Slinging}.] [AS. slingan; akin to
   D. slingeren, G. schlingen, to wind, to twist, to creep, OHG.
   slingan to wind, to twist, to move to and fro, Icel. slyngva,
   sl["o]ngva, to sling, Sw. slunga, Dan. slynge, Lith. slinkti
   to creep.]
   1. To throw with a sling. ``Every one could sling stones at
      an hairbreadth, and not miss.'' --Judg. xx. 16.

   2. To throw; to hurl; to cast. --Addison.

   3. To hang so as to swing; as, to sling a pack.

   4. (Naut) To pass a rope round, as a cask, gun, etc.,
      preparatory to attaching a hoisting or lowering tackle.

Sling \Sling\, v. t. [imp. {Slung}, Archaic {Slang}; p. p.
   {Slung}; p. pr. & vb. n. {Slinging}.] [AS. slingan; akin to
   D. slingeren, G. schlingen, to wind, to twist, to creep, OHG.
   slingan to wind, to twist, to move to and fro, Icel. slyngva,
   sl["o]ngva, to sling, Sw. slunga, Dan. slynge, Lith. slinkti
   to creep.]
   1. To throw with a sling. ``Every one could sling stones at
      an hairbreadth, and not miss.'' --Judg. xx. 16.

   2. To throw; to hurl; to cast. --Addison.

   3. To hang so as to swing; as, to sling a pack.

   4. (Naut) To pass a rope round, as a cask, gun, etc.,
      preparatory to attaching a hoisting or lowering tackle.

Slung \Slung\,
   imp. & p. p. of {Sling}.

   {Slung shot}, a metal ball of small size, with a string
      attached, used by ruffians for striking.

Source : WordNet®

sling
     n 1: a highball with liquor and water with sugar and lemon or
          lime juice
     2: a plaything consisting of a Y-shaped stick with elastic
        between the arms; used to propel small stones [syn: {slingshot},
         {catapult}]
     3: a shoe that has a strap that wraps around the heel [syn: {slingback}]
     4: a simple weapon consisting of a looped strap in which a
        projectile is whirled and then released
     5: bandage to support an injured forearm; consisting of a wide
        triangular piece of cloth hanging from around the neck
        [syn: {scarf bandage}, {triangular bandage}]
     [also: {slung}]

sling
     v : hurl as if with a sling [syn: {catapult}]
     [also: {slung}]

slung
     See {sling}