What is a pied ninny?
A bird that is partly black and partly white is called Pied wagtail.
The expression 'pied ninny' is used to mock a person, implying that they are a special creature, not just a silly person.It must be pretty rare to have a 'pied' ninny.
The Latin non compos mentis, also known as the French ne comprend pas, is a friendlier form of nincompoop.
Pied ninny is a silly person and a huge insult.It means you are an idiot, a dummy, and a silly person.