The Collaborative International Dictionary of English v.0.48:

Slink \Slink\, v. t. [imp. Slunk, Archaic Slank; p. p.
   Slunk; p. pr. & vb. n. Slinking.] [AS. slincan; probably
   akin to G. schleichen, E. sleek. See Sleek, a.]
   1. To creep away meanly; to steal away; to sneak. "To slink
      away and hide." --Tale of Beryn.
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            Back to the thicket slunk
            The guilty serpent.                   --Milton.
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            There were some few who slank obliquely from them as
            they passed.                          --Landor.
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   2. To miscarry; -- said of female beasts.
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The Collaborative International Dictionary of English v.0.48:

Slink \Slink\, v. t.
   To cast prematurely; -- said of female beasts; as, a cow that
   slinks her calf.
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The Collaborative International Dictionary of English v.0.48:

Slink \Slink\, a.
   1. Produced prematurely; as, a slink calf.
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   2. Thin; lean. [Scot.]
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The Collaborative International Dictionary of English v.0.48:

Slink \Slink\, n.
   1. The young of a beast brought forth prematurely, esp. a
      calf brought forth before its time.
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   2. A thievish fellow; a sneak. [Prov. Eng. & Scot.]
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WordNet (r) 3.0 (2006):

slink
    v 1: walk stealthily; "I saw a cougar slinking toward its prey"

Moby Thesaurus II by Grady Ward, 1.0:

119 Moby Thesaurus words for "slink":
   amble, barge, bowl along, bundle, clump, contort, corkscrew, couch,
   cower, crawl, creep, cringe, crinkle, crouch, drag, flounce, foot,
   footslog, go on tiptoe, grovel, gumshoe, halt, hippety-hop, hitch,
   hobble, hop, inch, inch along, intort, jog, jolt, jump, lay wait,
   lie in wait, limp, lumber, lunge, lurch, lurk, meander, mince,
   nightwalk, pace, pad, paddle, peg, piaffe, piaffer, plod, prance,
   prowl, pussyfoot, quail, rack, roll, sashay, saunter, scallop,
   scrabble, scramble, screw, scuff, scuffle, scuttle, serpentine,
   shadow, shamble, shirk, shuffle, sidle, single-foot, skip, skulk,
   slide, slither, slog, slouch, snake, sneak, sneaker, stagger,
   stalk, stamp, steal, steal along, stomp, straddle, straggle,
   stride, stroll, strut, stump, swagger, swing, swirl, tippytoe,
   tiptoe, tittup, toddle, totter, traipse, trip, trudge, turn, twine,
   twirl, twist, twist and turn, waddle, wamble, weasel, whirl, whorl,
   wiggle, wind, wobble, worm, worm along, wring