a woman who is lah-di-dah thinks she is better than other people and tries to speak as if she is from a high social class No one really liked her in the village. They all thought she was a bit lah-di-dah.
lah-di-dah
(ˈlɑˈdiˈdɑ)
1. mod. casual; relaxed and uncaring. She’s not all that calm about her possessions, but she is very lah-di-dah with men.
2. interj. a jeer; a mocking response. So you have a new car! Well, lah-di-dah.