laggard

moving or proceeding at less than the normal, desirable, or required speed I hate being stuck behind laggard motorists on the freeway Synonyms crawling, creeping, dallying, dawdling, dilatory, dillydallying, dragging, slow, lagging, languid, leisurely, poking, poky (or pokey), sluggish, snaillike, snail-paced, tardy, unhurriedRelated Words deliberate, measured; inactive, inert, lethargic, loafing, lounging; lingering, loitering, tarrying; ambling, heavy-footed, inching, plodding, shuffling, slow-footed; strolling; decelerating, slowing; filibustering, procrastinating, stallingNear Antonyms expeditious, prompt, ready; accelerated, hastened, quickened; hurried, rushedAntonyms barreling, bolting, breakneck, breathless, brisk, careering, dizzy, fast, fleet, flying, hasty, hurrying, lightning, meteoric, quick, racing, rapid, rocketing, running, rushing, scooting, scudding, scurrying, snappy, speeding, speedy, swift, warp-speed, whirling, whirlwind, whisking, zipping