Bar None British slang
Nothing/ no one else is better.
She is the most beautiful girl I have ever met in my life, bar none.
This is the most interesting film that I have ever watched, bar none.
To become better
We should be careful in doing everything instead of doing something risky.
Used to allude that the last force, problem or burden which is seemingly minor and small causes a person, system or organisation to collapse or fail
Her husband's violent act last night was the straw that broke the donkey's back and she left him