( BrE , informal ) to stop sth from happening; to bring bad luck to sth/sb :
We were going to have a barbecue but the rain put the mockers on that idea.
( BrE , informal ) to stop sth from happening; to bring bad luck to sth/sb :
We were going to have a barbecue but the rain put the mockers on that idea.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005