the last straw 忍无可忍
A：That was the last straw!
B：Why did you say that? Did your girlfriend do anything wrong?
A：She refused to see me. She must have fallen in love with another guy.
B：I don’t believe it. Talk with her, will you?
There must be some misunderstanding between you.
甲：真是让人忍无可忍！
乙：你为什么这么说？你女朋友做什么错事了吗？
甲：她拒绝见我，她一定是爱上别人了。
乙：我不相信。和她谈谈，好吗？你们之间一定是发生什么误会了。