unpleasant person vs upstart

Other hyponyms of unpleasant person include aggravator, annoyance, alienator, anathema, bete noire, asshole, bastard, cocksucker, dickhead, mother fucker, motherfucker, prick, shit, SOB, son of a bitch, whoreson, bore, dullard, cold fish, creep, spook, weirdie, weirdo, weirdy, critic, bitch, cunt, cynic, faultfinder, egoist, egotist, swellhead, grabber, churl, crank, crosspatch, grouch, grump, incubus, joker, turkey, demon, devil, fiend, monster, ogre, oppressor, pawer, barbarian, boor, churl, Goth, peasant, tike, tyke, pharisee, pill, prima donna, prude, puritan, bum, crumb, dirty dog, git, lowlife, puke, rat, rotter, scum bag, scumbag, skunk, so-and-so, stinker, stinkpot, flouter, jeerer, mocker, scoffer, common scold, nag, nagger, scold, scolder, selfish person, sneak, scorner, sneerer, prig, snob, snoot, snot, snorter, disagreeable woman, unpleasant woman, arriviste, nouveau-riche, parvenu, vulgarian, bellyacher, complainer, crybaby, grumbler, moaner, sniveller, squawker, whiner, dirt ball, insect, louse, worm.