Jumpman is a badge that appears only in Paper Mario: The Thousand-Year Door.
Mario can wear this badge by using two BP. While wearing the badge, Mario's attack increases, but he cannot use his hammer attacks during battle, however, Mario can still deal first strikes with his hammer attacks as he can still use his hammer in the overworld.
In contrast to the badge Hammerman, this badge is named Jumpman as Mario jumps instead of hammering and vice-versa. Jumpman is a reference to Mario's original name "Jumpman."