gunk

from WordNet (r) 3.0 (2006)

gunk
    n 1: any thick, viscous matter [syn: {sludge}, {slime}, {goo},
         {goop}, {gook}, {guck}, {gunk}, {muck}, {ooze}]

from The Collaborative International Dictionary of English v.0.48

gunk \gunk\ n.
   any thick gooey and messy substance. [informal]

   Syn: goo, gook, guck, muck, ooze, sludge, slime.
        [WordNet 1.5]

from Moby Thesaurus II by Grady Ward, 1.0

75 Moby Thesaurus words for "gunk":
      adherent, adhesive, albumen, barnacle, batter, bonnyclabber,
      bramble, brier, bulldog, burr, butter, cab, cement, clabber,
      cornstarch, cream, curd, decal, decalcomania, dough, egg white,
      gaum, gel, gelatin, glair, glop, glue, gluten, goo, gook, goop,
      gruel, gumbo, jam, jell, jelly, leech, limpet, loblolly, mire,
      molasses, mucilage, muck, mucus, ooze, pap, paste, plaster,
      porridge, prickle, pudding, pulp, puree, putty, remora, rob, scum,
      semifluid, semiliquid, size, slab, slime, slob, slop, slosh,
      sludge, slush, soup, splosh, starch, sticker, sticky mess, syrup,
      thorn, treacle