when sb/sth slips through the net , an organization or a system fails to find them and deal with them :
We tried to contact all former students, but one or two slipped through the net.
when sb/sth slips through the net , an organization or a system fails to find them and deal with them :
We tried to contact all former students, but one or two slipped through the net.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005