have no idea | not have the faintest, first, etc. idea
( informal ) used to emphasize that you do not know sth :
'What's she talking about?' 'I've no idea.'
He hasn't the faintest idea how to manage people.
have no idea | not have the faintest, first, etc. idea
( informal ) used to emphasize that you do not know sth :
'What's she talking about?' 'I've no idea.'
He hasn't the faintest idea how to manage people.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005