Emphasizing the breaking point:
* The tipping point: This idiom focuses on the moment something becomes irreversible.
* The straw that broke the camel's back: This is a more direct synonym of "the last straw."
* The final nail in the coffin: This implies that something is completely finished or doomed.
* The knockout punch: This emphasizes a sudden and decisive blow.
Emphasizing frustration or anger:
* Pushing someone too far: This idiom highlights the act of provoking someone.
* Reaching the end of one's rope: This conveys exhaustion and a feeling of being overwhelmed.
* Having enough is enough: This directly expresses a feeling of being fed up.
Emphasizing the accumulation of problems:
* The straw that broke the camel's back: This emphasizes the gradual buildup of burdens.
* The final straw: This is another direct synonym that focuses on the accumulation.
* The last straw: This is also a direct synonym that emphasizes the weight of what has been endured.
Emphasizing a particular emotion:
* To be fed up: This conveys annoyance and dissatisfaction.
* To be at the end of one's tether: This implies desperation and exhaustion.
* To be at one's wit's end: This signifies a feeling of being completely out of options.
The best idiom to use will depend on the specific context and the nuance you want to convey.