tit for tat

tit for tat  {n. phr.}

Расплата той же монетой; зуб за зуб; справедливая плата.

Billy hit me, so I gave him tit for tat.

I told him if he did me any harm I would return tit for tat.

They had a warm debate and the two boys gave each other tit for tat.

Ср.: GET BACK AT, EYE FOR AN EYE AND A TOOTH FOR A TOOTH.