失ㄕshī態ㄊㄞˋtài

  1. 言行、舉止不得當，有失身分或不合禮節。如：「酒後失態」。似失色

英to forget one's manners, to forget oneself, to lose self-control (in a situation)​
德Ausrutscher, Fehlverhalten, Vergehen (S)​