the straw that broke the camel’s back

(proverb) the final terrible thing that makes a situation unbearable

Example Sentences:

Veronica was very stressed when she failed her Physics exam and got a bad mark in her English class. The straw that broke the camel’s back was when she got into a car accident.

Son: Hi mom! I’m home from the party.
Mom: Are you drunk? You smell like beer.
Son: Yes!
Mom: Last week you smoked Marijuana, yesterday you were out until 5 A.M. and today you are drunk! This is the straw that broke the camel’s back. You are not allowed to go out anymore!
Son: That is so unfair!

From the Blogs:

The Straw That Broke The Camel’s Back The Shiv Experiment

Media:

Similar idioms:

1. the pot calling the kettle black
2. no hard feelings
3. ream out
4. stone sober
5. take one’s medicine
6. on second thought
7. take a rain check