The Collaborative International Dictionary of English v.0.48:

Hulking \Hulk"ing\, Hulky \Hulk"y\, a.
   Bulky; unwiedly; of great size and bulk; ponderous. [R.] "A
   huge hulking fellow." --H. Brooke.
   [1913 Webster]

WordNet (r) 3.0 (2006):

hulking
    adj 1: of great size and bulk; "a hulking figure of a man";
           "three hulking battleships" [syn: hulking, hulky]

Moby Thesaurus II by Grady Ward, 1.0:

52 Moby Thesaurus words for "hulking":
   all thumbs, awkward, blunderheaded, blundering, boorish, bulky,
   bumbling, bungling, butterfingered, careless, clownish, clumsy,
   clumsy-fisted, contrary, crosswise, cumbersome, cumbrous,
   elephantine, fingers all thumbs, fumbling, gauche, gawkish, gawky,
   graceless, ham-fisted, ham-handed, heavy-handed, hulky,
   impractical, inconvenient, inelegant, left-hand, left-handed,
   loutish, lubberly, lumbering, lumpish, lumpy, maladroit, massive,
   massy, oafish, perverse, ponderous, sloppy, stiff, uncouth,
   ungainly, ungraceful, unhandy, unmanageable, unwieldy