"Butter someone up "

It means "be nice to someone "

中文意思“奉承某人”

"Out to lunch "

It means "you are crazy"

Eg:Your English teacher is out to lunch

"A piece of cake"

It means "easy"

Eg:Cooking is a piece of cake for me .

"Spill the beans"

It means "tell the truth"

"A hard nut  to crack "

It means "difficult to understand "

"Bring home Bacon"

It means" earn money for home "

"I am hungry,I could eat a horse "

It means "I am starving "

"A cup of tea"

It means "you enjoy it "