Etymology
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tit for tat

1550s, possibly an alteration of tip for tap "blow for blow," from tip (v.3) "tap" + tap "touch lightly." Perhaps influenced by tit (n.2).

updated on February 10, 2014

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Definitions of tit for tat from WordNet

tit for tat (n.)
an equivalent given in return;
From wordnet.princeton.edu, not affiliated with etymonline.

Dictionary entries near tit for tat

tiresome

Tironian

tisane

tissue

tit

tit for tat

titan

titanic

titanium

tithe

tither