Ghost town
A deserted place with none or few people = There is no one around. This is a ghost town!
Dig your own grave
Do something that will cause you problems in the future = You can miss the class but you will dig your own grave
Make my blood boil
Something that makes you very angry = Racism makes my blood boil
Pale as a ghost
Very white person, probably ill = "He was pale as a ghost after getting vaccinated"
Night owl
Person who likes staying up late at night = "Laura is a night owl and does her homework after having dinner"
Out of your mind
To go crazy = "Adrià has moved to London. He's out of his mind!"
Stabbed in the back
Betrayed by someone = "She stabbed me in the back when she explained my secret"
Smell a rat
Think that someone is not honest = "I don't like your new friends. I smell some rats"
Cold blooded
Evil = It was a cold blooded crime!
Dead tired
To be exhausted = She looks dead tired! She has been studying all night.
Over my dead body
Something that will never happen = "-Can I drive your car? -Over my dead body!"
Skeleton in the closet
To have a secret = "Julian has a skeleton in his closet"