big deal

柯林斯词典

1. N-SING If you say that something is a big deal, you mean that it is important or significant in some way. 至关重要的事情[非正式]
I felt the pressure on me, winning was such a big deal for the whole family. 我感到了身上的压力，取胜对全家人是这么至关重要的事。
2. PHRASE If someone makes a big deal out of something, they make a fuss about it or treat it as if it were very important. 小题大做[非正式]
The Joneses make a big deal out of being "different."
琼斯一家子把“与众不同”看作是了不得的事。
3. CONVENTION You can say "big deal" to someone to show that you are not impressed by something that they consider important or impressive. 没什么大不了[非正式]
"You'll miss The Brady Bunch."—"Big deal."
“你会错过《布雷迪家庭》的。” — “没什么大不了的。”