Idiom of the Week

Hi Everybody!
From now on, every week, I will write a "Phrase of the Week"~Also known as "idioms or expressions".
I will post one every Sunday. I'll be using the book called "Dictionary of Idioms".

Idiom of the Week...

"Greek to me".
Definition: Hard to understand
Example: My mom tried to explain how to make guacamole but it was Greek to me.

P.S. For kids: If you want to know more about idioms or want to know more idioms, click HERE.