to have no connection with sb/sth :
Get out! It's nothing to do with you (= you have no right to know about it) .
That has nothing to do with what we're discussing.
to have no connection with sb/sth :
Get out! It's nothing to do with you (= you have no right to know about it) .
That has nothing to do with what we're discussing.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005