Lineu is a popular Brazilian character from the animated television series Os Simpsons. He is known for his quirky personality and distinctive appearance, often wearing a white lab coat. Lineu works as a doctor and is recognized for his humorous interactions with other characters in the show. The character is a parody of the typical medical professional, often finding himself in absurd situations. Os Simpsons uses Lineu to explore themes of family, friendship, and the challenges of everyday life, making him a memorable part of the series' ensemble cast.