[f. QUACK sb.2 + -Y1.] Of voices: Having the harsh quality characteristic of the cry of a duck. Hence Quackiness.
1895. Forum (N.Y.), June, 502. Our women’s voices are … hardened into an habitual ‘quacky’ or metallic quality…. ‘Quackiness’ and shrillness prevail less in the Southern States than in the Northern and Western.
