noun
nincompoop
NIHNG-kuhm-poop
noun
1
A silly, foolish person.
"Only a nincompoop would leave the front door wide open overnight."
"He called himself a nincompoop for forgetting the tickets."
How to Use Nincompoop
Learner’s notesIn plain EnglishAn old-fashioned, faintly comic word for a fool.
When to use it
Playful rather than cruel — often used affectionately or in jest.
Word Forms
nincompoops plural
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Etymology
Origin uncertain and debated for centuries; possibly linked to the name Nicodemus or to "ninny," with a second part that may come from an old sense of "poop" meaning to fool or deceive.