Beat (one) at (one's) own game verb phrase
When you beat someone at their own game, you take advantage of their abilities, strategies, or tactics to beat or defeat them.
I didn't expect that my friend who I taught how to perform that skill beat me at my own game.
I have proved that I can beat her at her own game.
Beating the champion at his own game, she has become the reigning champion.
To go far beyond what one should or is allowed to do
To completely surpass someone or a squad in a competition
To excel someone or something.
Someone or something that surpasses or outperforms everyone or everything else.
The verb "beat" must be conjugated according to its tense.
The origin of this idiom is not clear.
To punish someone or something harshly
He's a really strict teacher, so he'll definitely lower the boom on you if you don't do your homework.