Hamburglar is the McDonald's character whose name combines “hamburger” and “burglar.”
The Hamburglar was introduced in 1971 as one of the fictional residents of McDonaldland. His central advertising trait was an obsession with hamburgers: he attempted to steal them, usually while being stopped or exposed by Ronald McDonald and the other characters. The name made the character's role immediately clear through a playful alteration of the word “burglar.”
The original Hamburglar design was smaller and more childlike than the later version. McDonald's redesigned him in the 1980s with a taller appearance, a black-and-white striped outfit, a red cape, and a wide-brimmed hat. That redesign became the version most familiar to many viewers.
The character is sometimes confused with Captain Crook, another McDonaldland villain associated with Filet-O-Fish. Captain Crook's name and nautical costume identify a different character, while the Hamburglar's branding is specifically centered on hamburgers.