Synonyms for Stick-in-the-mud:

• n.

  •
  • Drongo,
  • fogey,
  • new,
  • bore,
  • dweeb,
  • anorak,
  • square,
  • dinosaur,
  • fossil,
  • mossback,
  • drip.
  •conservative (noun)
  • old liners,
  • middle-of-the-roaders,
  • middle of the roaders,
  • un-progressive,
  • pre server,
  • bitterenders,
  • un progressives,
  • pre-server,
  • un progressive,
  • standpats,
  • silk-stockings,
  • bitter enders,
  • un-progressives,
  • moderatists,
  • silk stockings,
  • unprogressives,
  • pre servers,
  • pre-servers,
  • bitter-enders,
  • silkstockings,
  • silkstocking,
  • bitterender.
  •diehard (noun)
  • fundamentalists,
  • pullback,
  • true blue,
  • bourbons,
  • praetorians,
  • ultra-conservative,
  • bourbon,
  • standpatter,
  • fundamentalist.
  •fogy (noun)
  • dodos,
  • fossils,
  • old fogey,
  • fogeys,
  • Dodoes,
  • dodo.
  •fogyish (noun)
  • fogyish.
  •fuddy-duddy (noun)
  • grannies,
  • dotards,
  • dull person,
  • fussbudget,
  • old fart,
  • granny,
  • old geezer,
  • old poop,
  • fussy person,
  • fusspots,
  • dotard,
  • old fogy,
  • fusspot,
  • dull people.
  •moss-grown (noun)
  • moss-grown.
  •mossy (noun)
  • mossy.
  •out of fashion (noun)
  • out of fashion.
  •party pooper (noun)
  • spoilsport,
  • GRINCH,
  • malcontents,
  • killjoy,
  • spoilsports.

• Other synonyms:

  •
  • fogy.
  •prig
  • prude.
  •Other relevant words:
  • slug,
  • snail,
  • conservationist,
  • stodgy,
  • Fud,
  • lingerer,
  • lotus-eater,
  • anachronism,
  • ultraconservative,
  • unfashionable,
  • relic,
  • sleepyhead,
  • putterer,
  • slouch,
  • slowcoach,
  • stuffy,
  • fart,
  • reactionary,
  • antique,
  • prig,
  • lounger,
  • procrastinator,
  • loafer,
  • sobersides,
  • sluggard,
  • slogger,
  • dawdle,
  • goldbrick,
  • dolittle,
  • idler,
  • antediluvian,
  • trudger,
  • tortoise,
  • trifler,
  • plodder,
  • person set in ways,
  • loiterer,
  • slowpoke,
  • unstylish,
  • clock watcher,
  • obstinate person,
  • mope,
  • right-winger,
  • lubber,
  • priggish.

Antonyms for Stick-in-the-mud:

• n.

  • unadventurous person
    radical, progressive, adventurer, liberal.
  • Other antonyms:
    hipster, modern, trendy, fashionable, stylish.