GrimacesBirthday。 According to the query of Sohu official website. Brother Milkman celebrated his 52nd birthday on June 12, 2023, and McDonald's released a GameBoy style game GrimacesBirthday featuring Brother Milkman overseas. Brother Milkshake, also known as Slippery Dudu, is a cartoon character of McDonald's. Brother Milkshake, who is huge, fragrant and refreshing, is uncle McDonald's best friend.