( informal ) to be the best thing, person, idea, etc. :
He thinks he's the cat's whiskers (= he has a high opinion of himself) .
( informal ) to be the best thing, person, idea, etc. :
He thinks he's the cat's whiskers (= he has a high opinion of himself) .
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005