( NAmE , informal ) used to ask why sb is behaving in a strange way :
What's with you? You haven't said a word all morning.
( NAmE , informal ) used to ask why sb is behaving in a strange way :
What's with you? You haven't said a word all morning.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005