big deal

US /bɪɡ diːl/
UK /bɪɡ diːl/
"big deal" picture
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。