beat someone at his or her own game
Surpass someone in his or her own specialty or undertaking. For example, Jean knew that if she matched the new store's discount she would keep all her customers and beat the new competitors at their own game. The use of game for any kind of undertaking or scheme dates from the mid-1200s.
Words nearby beat someone at his or her own game
beat off,
beat one's brains out,
beat one's head against the wall,
beat out,
beat poets,
beat someone at his or her own game,
beat the air,
beat the band,
beat the bushes for,
beat the clock,
beat the drum for