Stodgy

Adjective

 * 1)  having a thick, semi-solid consistency; glutinous; heavy on the stomach.
 * 2) dull, old-fashioned
 * I gave up trying to get that stodgy club to try anything new.

Thesaurus
Spartan, adhesive, aloof, amylaceous, apathetic, arid, banausic, barren, blah, bland, blank, bloodless, boring, characterless, clabbered, clammy, clotted, coagulated, cold, colorless, curdled, dead, deadly, detached, dim, dismal, doughy, dowdy, draggy, drearisome, dreary, dry, dryasdust, dull, dusty, effete, elephantine, empty, etiolated, fade, flat, fogyish, frumpish, frumpy, fuddy-duddy, gaumy, gelatinous, glairy, gluelike, gluey, glutenous, glutinose, glutinous, gooey, grumous, gumbo, gumbolike, gumlike, gummous, gummy, heavy, ho-hum, hollow, humdrum, inane, indifferent, indomitable, inexcitable, insipid, inspissated, jejune, jelled, jellied, jellylike, leaden, lifeless, long-suffering, low-spirited, matter-of-fact, monotone, monotonous, mucilaginous, old-fogy, old-fogyish, out-of-date, outmoded, pale, pallid, pasty, patient, pedantic, pedestrian, phlegmatic, plodding, pointless, poky, ponderous, ravaged with age, resigned, ropy, self-controlled, senile, slabby, slimy, slithery, slow, solemn, spiritless, starchy, sterile, sticky, stiff, stoic, stolid, stringy, stuffy, superficial, syrupy, tacky, tasteless, tedious, tenacious, thick, thickened, tiresome, tough, tremelloid, tremellose, turgid, unassailable, unconcerned, unexciting, unimaginative, uninteresting, unlively, vapid, viscid, viscose, viscous, weighty, wooden

Etymology
, but possibly from stodge:, from stog:, or a.