Gerardo Luigi "Jerry" Colonna (September 17, 1904, Boston, Massachusetts - November 21, 1986, Woodland Hills, California) was an Italian-American comedian, singer and songwriter, remembered best as the zaniest of Bob Hope's sidekicks on Hope's popular radio shows and films of the 1940s and 1950s.
With his pop-eyed facial expressions and walrus-sized handlebar mustache, Colonna was known for singing loudly "in a comic caterwaul," according to Raised on Radio author Gerald Nachman, and for his catch phrase, "Who's Yehudi?", uttered after many an old joke, although it usually had nothing to do with the joke. The line was believed to be named for violin virtuoso Yehudi Menuhin, and the search for Yehudi became a running gag on the Hope show.
Colonna played a range of nitwitted characters, the best remembered of which was a moronic professor. Nachman wrote: