TgO Gen27:44 :עַד דְתִתוּב חִמתָא דַאֲחוּך‏ : until your brother's anger settles down
See the entire entry for ḥemmā, ḥemmṯā n.f. anger

The unusual G form at TgOnk Gen. 27:44,דְתִתוּב is a portmanteau combining דִיתוּב (for the masc. subject variant, note this form in the next verse) with תְתוּב (for the feminine one). Such portmanteau forms have long been recognized in the Tiberian BH tradition, but may be a new discovery for this tradition.
Alternatively, of course, it may just be a simple scribal error in the main text influenced by the similar-looking initial verb in the line, from a different verb altogether. (S.Kaufman)