game-changer

or game chang·er

[ geym-cheyn-jer ]
/ ˈgeɪmˌtʃeɪn dʒər /

noun

Sports. an athlete, play, etc., that suddenly changes the outcome of a game or contest.
a person or thing that dramatically changes the course, strategy, character, etc., of something: Social media has been a real game-changer in the company’s marketing efforts.

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Origin of game-changer

First recorded in 1960–65

OTHER WORDS FROM game-changer

game-chang·ing, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for game-changer