nincompoop nincom • nincompoopery · · · Info · Definitions · Synonyms · Characters · · nincompoop · · Text Latin · · Script 10 · · Length Definitions · · · (noun) a stupid foolish person. Synonyms: poop, ninny. · · Noun Definition 1 Synonyms · · · poop · · Synonym 1 ninny · · Synonym 2 Characters · · c latin small letter c U+0063 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070