In episode 253 of the Simpsons TV show, "Homer vs. Dignity", Mr. Burns has Homer play a prank on Comic Book Guy wherein Homer buys a rare comic book and eats it in front of Comic Book Guy. Before the prank, Mr. Burns says:
"Look at that comic book fellow, calmly eating candy like a Spaniard."
What is the origin of Mr. Burns calling him a "Spaniard"? Was that ever a real world insult or just meant to sound like something a 100+ year old person would say?