大不了 (dà bù liǎo): If the worst comes to the worst (Adverb) — Meaning & Stroke Order

This apple is rotten, at worst we can just buy another one.

Haven't you considered that, if the worst comes to the worst, you could apply for an extension to submit the report?

It's okay if you didn't do well on the exam, at worst you can just try harder next time.

If it rains, at worst we can just go to the park another day.