pay back in own coin

pay somebody back in their own coin

(British & Australian old-fashioned)

to treat someone in the same bad way that they have treated you I decided to pay her back in her own coin and refuse to help her.

Name	Pronounced	Usage
Cara	KAHR-ə, KER-ə	English
Marcelo	mahr-THE-lo (Spanish), mahr-SE-lo (Latin American Spanish)	Spanish, Portuguese
Docia	-	English
Thera	-	Dutch
Aretas	-	Biblical
Bonner	['bɔnə]