Origin: (1-2) 1800-1900 tacky horse in poor condition.
1disapproving showing that you do not have good judgment about what is fashionable, socially acceptable, etc.: It’s really tacky to request gifts on an invitation.2disapproving cheap looking and of very bad quality: tacky souvenirs3slightly sticky [Origin: (1-2) 1800–1900 tacky horse in poor condition.]—tackily adverb—tackiness noun [uncountable]