BILLBUG Meaning of BILLBUG in English /bil"bug'/ , n.any of several weevils, esp. of the genera Calendra and Sitophilus, that feed on various grasses. [ 1860-65, Amer.; BILL 2 + BUG 1 ] Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012