airs and graces 装模作样
A：Take a look at Sarah!She is dancing with Joe with such airs and graces.
B: I can't agree,She's only a little shy.
all one's geese are swans 言过其实
A：He always likes to say something as if all his geese are swans.
B: I know this characteristic of him.So I never think seriously of his words.
A: Yeah.This is a clever way to be in contact with such a person.
B: It seems that you don't like him.
A: You like to communicate with him?