DAFFY Meaning of DAFFY in English — daffily , adv. — daffiness , n./daf"ee/ , adj., daffier, daffiest . Informal.silly; weak-minded; crazy. [ 1880-85; daff (obs.; see DAFF 1 ) + -Y 1 ] Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012