Idioms

Let bygones by bygones : Gorget something that happened to you bad.
Ex : Do you really remember this fight let bygones be bygones.

Don't judge a book by it's cover : Don't look on what it looks on the outside look on what's on the inside.
Ex : I chose this book cause it's cover looks nice but actually the story isn't nice like they say don't judge a book by it's cover.

A dime a dozen : Something really cheat that doesn't cost a lot.
Ex : These shoes are really cheap there a dime a dozen.

A piece of cake : very easy or very easily done.
Ex : This mission is so easy it's a piece of cake.

A taste of your own medicine : That if you've done something wrong or right it's the thing that you deserve.
Ex : This boy deserves what happened to him it's a taste of his own medicine.