The final/last straw

The last straw (also the straw that breaks the camel's back). le coup de grâce, la goutte qui fait déborder le vase

• Losing my ​job was ​bad enough, but being ​evicted was the ​final straw.
• She's always been ​rude to me, but it was the last straw when she ​started ​insulting my ​mother.