The nickname of Arthur Fonzarelli (Henry Winkler) a former gang member (The Falcons) turned mechanic on the sitcom HAPPY DAYS/ABC/1974-84.
“The Fonz” or “Fonzie” wore a leather jacket and was so cool, he just needed to snap his fingers and girls would come running.
However, he did have his Achilles heels. He couldn’t say the phrase “I’m wrong” or “I’m sorry” without difficulty, and he freaked-out at the sight of liver.
Note: The name of “Arthur Fonzarelli” was suggested to producer Gary Marshall by writer Bob Brunner. In an article in TV Guide, Marshall told how he fashioned the Fonzie character after “the only guy in my old neighborhood who had a motorcycle. This guy was cool…he very rarely spoke; he just kind of hovered. He’d nod a lot and he’d make guttural sounds-and everybody would get out of his way.”
See also – “Skippy”