From Longman Dictionary of Contemporary Englishninnynin‧ny /ˈnɪni/ noun (plural ninnies) [countable] old-fashioned STUPID/NOT INTELLIGENTa silly person
Examples from the Corpus
ninny• Like a big ninny sitting there bemoaning your fate.• How can she possibly know somebody well enough to get married, the little ninny!• If you want to survive, you shivering ninny, you might as well shoot off your big toe.• Fritz was maid, butler, and errand boy, the stalwart ninny who never spoke a word of complaint.• Stupid ninny, think of that.Origin ninny (1500-1600) Perhaps from innocent 