nonny /ˈnɒni/exclamation 1noun 2forms 1 exclamation1 •A meaningless word used in refrains, especially in old English ballads and glees.Then sigh not so, But let them go, And be you blithe and bonny, Converting all your sounds of woe Into Hey nonny, nonny. — 1598 noun2 •An anon; a user who posts anonymously on the Internet. •(no longer used) A fool. formsnonnies