adjective

(especially of speech, writing, or ideas) pompous or pretentious.

you don’t want any highfalutin jargon

pretentious,affected,high-sounding,high-flown,lofty,grandiose,magniloquent grandiloquent,ornate,florid,flowery,overblown,overdone,overripe,overwrought,verbose,inflated,rhetorical,oratorical,turgid,pompous,bombastic,declamatory,sonorous,portentous,pedantic,boastful,boasting,bragging,windy,purple,la-di-da,fancy-pants,hoity-toity,poncy,posh,fustian,euphuistic,orotund,tumid