clunky, gawky, infelicitous, unwieldy, bungling, cumbersome, ungainly, fumbling, bunglesome, unskilled, more...

graceful, coordinated, agile, dexterous

klutz, klutzy, clutz, klutziness, klutzyness, more...

little, own, first, great, old, same, few, big, best, large, real

average klutz,   inept sort,   very awkward,   unhandy sort,   not adept,   graceless guy,   not agile,   gi who's all thumbs,   more awkward,   awkward one