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
Gill	JIL	English
MarÍA	mah-REE-ah (Spanish)	Spanish, Galician, Icelandic
Justin	JUS-tin (English), zhoo-STEN (French)	English, French, Slovene
Cunobelinus	kyoo-no-bə-LIEN-əs (English)	Ancient Celtic
Eugeniusz	e-uw-GEN-yuwsh	Polish
Rauha	ROW-hah	Finnish