4. What does Gatsby flaunt at Tom? What hypocritical remark does Tom make in reply?

While at dinner, Gatsby flaunts the fact that he knew Daisy (very well!) before she married Tom. Tom belittles Gatsby's past relationship with Gatsby as being cheap and frivolous,   

I wonder where in the devil he met Daisy. By God, I may be old-fashioned in my ideas, but women run around too much these days to suit me. They meet all kinds of crazy fish.