n.; pl. Ninnies [ Cf. It. ninno, ninna, a baby, Sp. niño, niña, child, infant, It. ninna, ninna nanna, lullably, prob. fr. ni, na, as used in singing a child to sleep. ] A fool; a simpleton. Shak. [ 1913 Webster ]
n. A simpleton; a silly person. [ Colloq. ] Addison. [ 1913 Webster ]