/ weərˈɒv; NAmE -ˈʌv/ conjunction
( old use or humorous ) of what or which :
I know whereof I speak (= I know a lot about what I am talking about) .
/ weərˈɒv; NAmE -ˈʌv/ conjunction
( old use or humorous ) of what or which :
I know whereof I speak (= I know a lot about what I am talking about) .
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005