ungrateful, unthankful, arrogant, bootlicker, egotistical, egomaniac, flatterer, sponger, boor, nincompoop, conceited, egoistical, dunderhead, insolent, oaf, unlovable, pappa, nagger, fusspot, imbecile, underminer, whiner, tosspot, moron, impertinent, trollop, crybaby, blabbermouth, haughty, selfish, egotists, fuckwit, uncouth, lecher, prigs, betrayer, shmuck, bobo, sycophant, insufferable, stooge, fatso, idiot, traitor, backstabber, heartlessly, berk, cretin, blackguard, scumbag, whore, lackey, ingratitude, braggart, dissembler, simon legree, unappreciative, spiteful, narcissistic, overemotional, whinger, conniver, harridan, wimp, rascal, unloving, douche bag, vulgarian, sluggard, peevishly, petulant, pitying, lout, mudslinger, egocentric, unfeeling, dolt, ungentlemanly, fornicator, harlot, freeloader, uncaring, sulker, stoolie, obnoxious, whiteman, errand boy, pissant, hussy, coward, simp, idolater, skinflint, greedy, ungraciously, uncharitably, hypocrite, meddler, scoundrel, miscreant, brute, rascals, scamp, wretch, brutes, cowards, scoundrels, coquette, creature, cur, deceiver, flirt, humbug, disobedient, apostate, faithless, outcast, unborn, wronged, afflicted, humbled, incapable, loving, beloved, born, brave, credulous, darling, elder, emancipated, erring, exiled

persona non grata, unwelcome person

thankless wretch, ungrateful person