So what if I do?

So what if I do?

What meaningful difference will it make if I do the thing you just mentioned? A: "You're telling me you're going to drive nearly 500 miles just to spend an hour with your girlfriend?" B: "Yeah? So what if I do? It's my car and my time!" A: "I can't believe you actually want the teacher to assign extra homework." B: "So what if I do? I like physics, and I think figuring out more problems at home would be fun!"
See also: if, what
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

What if I do?

Does it matter to you if I do it?; What difference does it make if I do it? Tom: Are you really going to sell your leather coat? Bob: What if I do? Jane: You're not going to go out dressed like that, are you? Sue: So what if I do?
See also: if, what
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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