( informal ) used to show that you are annoyed that sb does not understand sth :
When will you get it into your thick head that I don't want to see you again!
( informal ) used to show that you are annoyed that sb does not understand sth :
When will you get it into your thick head that I don't want to see you again!
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005