used to talk about how much sb/sth is connected with sb/sth
•
Her job has something to do with computers.
•
‘How much do you earn?’ ‘What's it got to do with you?’
•
Hard work has a lot to do with
(= is an important reason for)her success.
•
We don't have very much to do with our neighbours
(= we do not speak to them very often).
•
I'd have nothing to do with him, if I were you.
Useful english dictionary. 2012.