Murphy's Law is a saying: "Anything that can go wrong will go wrong."
It means: to have the worst luck.
For example, if you have an appointment and your car gets a flat tire,
you can say: "Murphy's Law".
This blog is mainly to explain a different English language expression every day. Sometimes I post other stuff. I also have a YouTube channel which is mostly about computer software: https://www.youtube.com/englishspacedog