Collins COBUILD Advanced Learner's English Dictionary - big deal

1. If you say that something is a big deal, you mean that it is important or significant in some way. (INFORMAL) I felt the pressure on me, winning was such a big deal for the whole family... It’s no big deal. N-SING 2. If someone makes a big deal out of something, they make a fuss about it or treat it as if it were very important. (INFORMAL) The Joneses make a big deal out of being ‘different’. PHRASE: V inflects, PHR out of/of/about n 3. You can say ‘big deal’ to someone to show that you are not impressed by something that they consider important or impressive. (INFORMAL) ‘You’ll miss The Brady Bunch.’—‘Big deal.’ CONVENTION c darkgreen]feelings