Muscle Man is a character from the animated television series Regular Show. He is known for his large, muscular build and his distinctive green skin. Muscle Man often wears a tank top and shorts, showcasing his physique, and he has a humorous personality that adds to the show's comedic elements. In the series, Muscle Man works at the park alongside other characters like Mordecai and Rigby. He is known for his catchphrase, "My mom!" which he uses in various humorous contexts. His character often engages in silly antics and challenges, contributing to the overall fun and lighthearted tone of the show.