It's the last straw that breaks the camel's back. 【谚】 骆驼负载过重时,最后加的一根稻草也会压断脊背.
This is the last straw,l tell you,what you have said is outrageous.告诉你,我实在是忍无可忍了,你刚才的话太岂有此理.
Her conduct was the last straw and her father lashed out at her.她的行为教人忍无可忍,她父亲把她大骂了一顿.