Definition of pay someone back in his or her own coin in US English:

pay someone back in his or her own coin

phrase

  • Retaliate with similar behavior.

    • ‘Worrell knew very well why Buller had been picked and decided to pay them back in their own coin.’
    fight back, strike back, hit back, respond, react, reply, reciprocate, counterattack, return fire, return the compliment, put up a fight, take the bait, rise to the bait, return like for like, get back at someone, get, give tit for tat, give as good as one gets, let someone see how it feels, give someone a dose of their own medicine, give someone a taste of their own medicine
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