/toom"leuhr/ , 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.
[ 1930-35; tumler one who makes a racket, stir, equiv. to tuml ( en ) to make a racket + -er -ER 1 ; cf. MHG getümel noise; see TUMBLE ]