( informal ) used to introduce information that is true but that may surprise people :
Believe it or not, he asked me to marry him!
( informal ) used to introduce information that is true but that may surprise people :
Believe it or not, he asked me to marry him!
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005