“Have a sweet tooth” means “to like to eat sweet food”. Example: The girl has a sweet tooth. She loves chocolate.
“As blind as a bat” means “unable to see well”. Example: I’m as blind as a bat without my glasses.
“Just what the doctor ordered” means “exactly what was wanted or needed”. Example: An evening without the kids was just what the doctor ordered.
“Spit it out” means “go ahead and say something”. Example: Come on, spit it out…
“Blue in the face” means “exhausted from anger”. Example: You can argue until you’re blue in the face, but I refuse to go.
“Have one foot in the grave” means “to be very old and close to death”. Example: You’d better go visit uncle Bill while you can. He has one foot in the grave.
“Show someone the door” means “to dismiss someone from a job”. Example: Jones made the mistake of complaining about the boss and was shown the door.
“Blow your top” means “to become very angry”. Example: My father will blow his top when he sees what happened to the car.
“Like a kid in a candy store” means “very happy and excited about something”. Example: Robert felt like a kid in a candy store when he went to the International Motor Show.