so surprised that you do not know what to say 瞠目结舌的;目瞪口呆的 I was gobsmacked when she told me the news. 当她告诉我这个消息时,我大吃一惊。
Word Origin1980s: from gob ‘mouth’ + smack ‘slap’, with reference to being shocked by a blow to the mouth, or to clapping a hand to one's mouth in astonishment.