1
general::
Phrase(s): What of it?
Inf. What does it matter?; Why treat it as if it were important?; Why do you think that this is any of your business? (A bit contentious.) • John: I hear you’ve been having a little trouble at the office. Bob: What of it? • Sue: You missed a spot shaving. Fred: What of it?
McGrawhill's American Idioms And Phrasal Verbs