Same word as unabashed:

abandoned, arrant, audacious, bald-faced, barefaced, blatant, bold, brash, brassy, brazen, brazenfaced, cheeky, depraved, dissolute, flagrant, forward, hardened, high-handed, immodest, immoral, improper, impudent, incorrigible, insolent, lewd, outrageous, overbold, presumptuous, profligate, reprobate, rude, unashamed, unblushing, unchaste, unprincipled, wanton