feelings You can say `big deal' to someone to show that you are not impressed by something that they consider important or impressive. `You'll miss The Brady Bunch.' --- `Big deal.'
If you say that something is a big deal, you mean that it is important or significant in some way. I felt the pressure on me, winning was such a big deal for the whole family It's no big deal
If someone makes a big deal out of something, they make a fuss about it or treat it as if it were very important. The Joneses make a big deal out of being `different'