Joey Bishop

Joey Bishop is a comedian.

History
Krusty isn't scared of Gabbo, as he's had plenty of guys come after him, and has buried them all, including Joey Bishop.

When there's a knock on the door at 8am, Krusty says that if it is Joey Bishop he's "not gonna give you Liza's new number!", and reveals that Minnelli has a restraining order out against Bishop.