Which McDonald's advertising character was known for saying “Robble, robble”?

The Hamburglar was the McDonald's advertising character associated with the phrase “Robble, robble.”

The character was introduced in 1971 as a mischievous figure who wanted to steal hamburgers. His black-and-white striped clothing, cape, mask, and small stature made him visually distinct within the McDonaldland cast.

The Hamburglar changed considerably over time. The earliest version was a more sinister-looking adult character, while later advertising presented him as a smaller, more cartoon-like child. His speech also became a memorable part of the brand's character language.

The Hamburglar is sometimes confused with Grimace because both characters were introduced during the same broad advertising era. Their roles differed: the Hamburglar focused on hamburgers, while early Grimace advertising centered on milkshake stealing.