la-di-da

形容词 la-di-da:

1. affectedly genteel
   同义词：grandiose, hifalutin, highfalutin, highfaluting, hoity-toity

1. I can't stand her or her la-di-da friends.
   我受不了她或她那些惺惺作态的朋友。

la-di-da 也作 la-de-da

adj.Informal （形容词）【非正式用语】
Affectedly genteel; pretentious.
故作文雅的；做作的

来源：
[Perhaps imitative of affected speech]
[可能源于对矫揉造作言谈的模仿]