Night owl.
A person who tends to stay up late.
Over my dead body.
To refuse to do something.
To scare the pants off someone
To frighten someone a lot.
Scaredy cat.
Someone who is easily frightened.
Not a cat in hell's chance.
There's no chance at all.
Stabbed in the back.
To be betrayed by a friend or colleague.
To dig one's grave
To be responsible for one's downfall or ruin. It's a way of expressing that you've made a big mistake.
To be scared stiff.
To get so scared you're not able to move.
To spill your guts.
To confess everything.
Wouldn't say boo to a goose.
A shy or nervous person.
To make someone's blood boil.
To make someone very angry.