big deal
US /bɪɡ diːl/
UK /bɪɡ diːl/

1.
大事, 大不了的
something important or significant
:
•
Getting this promotion is a really big deal for my career.
获得这次晋升对我的职业生涯来说是件大事。
•
It's no big deal if you can't make it to the party.
如果你不能来参加派对,那没什么大不了的。
2.
那又怎样, 没什么大不了的
used ironically to suggest that something is not as important as someone thinks
:
•
So you got a new phone, big deal. Mine is better.
所以你买了个新手机,那又怎样?我的更好。
•
You finished the report an hour early? Big deal, everyone else finished yesterday.
你提前一小时完成了报告?那又怎样,其他人昨天就完成了。