麻烦大了

in serious trouble

→ 麻烦
phrase Rare #30,675
in serious trouble 了 emphasizes that the situation has become serious.
CH: 钥匙不见了,我们麻烦大了。
EN: The keys are missing; we're in serious trouble.

我再不走就麻烦大了

If I don't leave now, I'm going to be in big trouble.

— 窃听风暴 (2006)

麻烦大了

This is a real mess.

— 鬼灭之刃:无限列车篇 (2020)

我现在在泰国,我告诉你我麻烦大了

I’m in Thailand now, and I’m telling you, I’m in big trouble.

— Lost in Thailand (2012)

咱们这次麻烦大了

We’re in big trouble this time.

— 追击者 (2008)