The Collaborative International Dictionary of English v.0.48:

Ropy \Rop"y\, a.
   capable of being drawn into a thread, as a glutinous
   substance; stringy; viscous; tenacious; glutinous; as ropy
   sirup; ropy lees.
   [1913 Webster]

WordNet (r) 3.0 (2006):

ropy
    adj 1: of or resembling rope (or ropes) in being long and strong
           [syn: ropy, ropey]
    2: forming viscous or glutinous threads [syn: ropy, ropey,
       stringy, thready]
    3: (British informal) very poor in quality; "ropey food"; "a
       ropey performance" [syn: ropey, ropy]

Moby Thesaurus II by Grady Ward, 1.0:

105 Moby Thesaurus words for "ropy":
   adhesive, amylaceous, below par, capillary, cartilaginous, chewy,
   cirrose, cirrous, clabbered, clammy, clotted, coagulated, cohesive,
   coriaceous, curdled, deficient, doughy, durable, fibered, fibroid,
   fibrous, filamentous, flagelliform, flossy, funicular, gaumy,
   gelatinous, glairy, gluelike, gluey, glutenous, glutinose,
   glutinous, gooey, gossamery, gristly, grumous, gumbo, gumbolike,
   gumlike, gummous, gummy, hairlike, hairy, hard, hardy, heavy, ill,
   inadequate, indifferent, inferior, inspissated, jelled, jellied,
   jellylike, lasting, leatherlike, leathery, ligamental, mediocre,
   mucilaginous, out of sorts, pasty, poor, poorly, questionable,
   resistant, rough, sickly, silky, sinewy, sketchy, slabby, slimy,
   slithery, starchy, sticky, stiff, stodgy, stringy, strong,
   stubborn, substandard, syrupy, tacky, taeniate, taeniform,
   tenacious, thick, thickened, threadlike, thready, tough,
   tough as leather, tremelloid, tremellose, under the weather,
   unsatisfactory, untiring, unwell, vigorous, viscid, viscose,
   viscous, wiry