( BrE , informal ) used to say that sth is the final and worst event in a series of unpleasant or annoying events :
It was cold and raining, and, to crown it all, we had to walk home.
( BrE , informal ) used to say that sth is the final and worst event in a series of unpleasant or annoying events :
It was cold and raining, and, to crown it all, we had to walk home.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005