Hi everyone; How are you guys?

I would like to kown a little more about expressions like:

My car is my bread and butter.

Pedro is a flip-flopper He changed his mind again.

I like to listen to Simon Sinek He is my beacon

John shot himself in the foot When He decided to buy an old bike

This medicine doesn´t work, it sounds like a snake oil

I would like to know your opinions about to study these expressions

Useful, waste of time etc........

"Thinking about daily english"

Thank you so much!