( BrE , informal ) to try to improve your performance, work, behaviour, etc. :
You're going to have to pull your socks up.
( BrE , informal ) to try to improve your performance, work, behaviour, etc. :
You're going to have to pull your socks up.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005