Question 1

What does "the last straw" mean?

Accepted Answer

The final problem in a series that makes a situation unbearable.

Question 2

How do you use "the last straw" in a sentence?

Accepted Answer

His constant lateness was the last straw — she ended the partnership.

Question 3

Is "the last straw" formal or informal?

Accepted Answer

"the last straw" is register-neutral — appropriate in both casual and formal contexts. Refers to the idea that even a small addition can break something already at its limit.