It ultimately fizzes out, but “Bottoms” confirms that Seligman and Sennott are major new forces in American comedy. A lot does click here, including several delicious supporting performances, most notably the former N.F.L. running back Marshawn Lynch as the fight club’s loopy faculty adviser and Ruby Cruz as Hazel, a cool classmate whom, naturally, PJ does not even see. For most of its tight running time, “Bottoms” hovers on the cusp of greatness. BottomsRated R for typical teen language, fight-club violence and football run amok.

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Persons: Seligman, Sennott’s, ”, Sennott, Marshawn Lynch, Ruby Cruz, Hazel, Annie, Zamani Wilder, Josie, —