tummler

[Origin: 1930–35; from Yiddish 'tumler', one who makes a racket, stir]

n.
1. A male entertainer, as formerly employed by resorts in the Catskill Mountains, who combined the duties of a comedian, activities director, and master of ceremonies to keep the guests amused throughout the day.
2. Any lively, prankish, or mischievous man.