“Fight fire with fire”

“It’s not rocket science”

It’s not very complicated.

“Take it with a grain of salt”

To not completely believe something.

“Green with envy”

Very jealous.

“Bite off more than you can chew”

To take on too much responsibility.

“Rome wasn’t built in a day”

Important things take time.

“Break a leg”

A way to wish someone good luck.

“Actions speak louder than words”

What people do is more important than what they say.

“Costs an arm and a leg”

Very expensive.