Bad Apple: A person who is bad and makes other bad is a bad apple.
Apples and oranges: 'Apples and oranges' used when people compare or describe two totally different things. ('Apples to oranges' is also used.)
Can't do it for toffee: If you can't so something for toffee, you are incapable of doing something properly or to any sort of standard
Cheap as chips: (UK) If something is very inexpensive, it is as cheap as chips.
Don't cry over spilt milk: When something bad happens and nothing can be done to help it people say, 'Don't cry over spilt milk'.
Dine on ashes: I someone is dining on ashes he or she is excessively focusing attention on failures or regrets for past actions.
Nice as pie: If a person is nice as pie, they are surprisingly very kind and friendly. "After our argument, she was nice as pie!"
Make a meal: If someone makes a meal of something, they spend too long doing it or make it look more difficult than it really is.
Rice missionary: A rice missionary gives food to hungry people as a way of converting them to Christianity.