The Hamburglar was McDonald's character associated with stealing hamburgers in its 1970s advertising.
The character's name combined “hamburger” with the word “burglar,” making his role immediately understandable. In early versions, he appeared as a small, mischievous figure dressed in striped clothing and a cape. His catchphrase-like “Robble Robble” vocalization became closely associated with the character.
The Hamburglar was part of McDonaldland, where his attempts to take hamburgers created simple comic plots for television commercials and other promotions. McDonald's later redesigned him, making him look older and more human while retaining the core hamburger-stealing concept.
The Hamburglar is sometimes confused with Captain Crook, whose character was connected with Filet-O-Fish advertising, or with Grimace, who had an earlier milkshake-related role. Those characters belonged to the same advertising world but had different identities.