Definitions

1. noun

an old-fashioned or colloquial term for a foolish or incompetent person, especially a man

“He was called a magoo for not checking the expiration date on the milk”

2. proper noun

a character from American cartoons and comic books, known for his foolish behavior and silly antics

“The Magoo character was first created in the 1940s by cartoonist Mort Walker”