To smell a rat.
To suspect that something wrong or dishonest is happening.
Scaredy cat.
Someone who is easily frightened.
Graveyard shift.
A work shift that happens overnight.
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.
Playing devil's advocate.
To present the other side of an argument even though you don't personally support it.
To be scared stiff.
To get so scared you're not able to move.
Night owl.
A person who tends to stay up late.
A snowball's chance in hell
There's no chance at all.
To spill your guts.
To confess everything.
Like a bat out of hell.
To move extremely quick without thought or in a panic.
Stabbed in the back.
To be betrayed by a friend or colleague.
Witch hunt.
To unfairly seek to damage others, perhaps because of a false view of their beliefs.
Skeleton crew
The smallest number of people needed for a business to operate.
Ghost town.
A deserted place where there are few or no people.
Drop dead gorgeous.
Someone very good looking.
To make someone's blood boil.
To make someone very angry.
Wouldn't say boo to a goose.
A shy or nervous person.
Skeleton in the closet/cupboard.
To have an embarrassing secret about your past.
In cold blood.
To do something deliberately in a ruthless manner.
To scare the pants off someone
To frighten someone a lot.
Over my dead body.
To refuse to do something.