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.
To be outperformed or outrun by someone, usually by a very wide margin.
You have to be quicker to finish this task or you will eat other my dust.