( informal ) used to tell sb that you do not know any more about a subject than the person that you are talking to does :
'Who's going to win?' 'Your guess is as good as mine.'
( informal ) used to tell sb that you do not know any more about a subject than the person that you are talking to does :
'Who's going to win?' 'Your guess is as good as mine.'
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005