ninny
/ˈnɪni/ noun
Forms ninnies
Synonyms
simpleton dummkopf addle-brain addlehead addle pate airhead baboon beanbrain beetlebrain beetlehead berk bimbo birdbrain blockhead blubberbrain bonehead Boeotian boob bozo brainlet nincompoop poop
Etymology
Unknown; the synonym ninnyhammer appears around the same time. Possibly related to innocent or Italian ninno (“small child”).
Webster’s 1913
Etymology [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.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “ninny”, CC BY-SA 4.0. Details