Ojousama is a descriptive term often used in Japanese fiction that translates directly to "
young lady".
Typically, however, it is used specifically to describe
rich girls.
Ojousamas are also characterized by their
behaviour, most commonly being their distinct way of laughing.
Takumi: "Have
you seen the new transfer student?"
Kenta: "Yeah, she radiates that ojousama energy."
Takumi: "
I know right? You can tell by how she laughs"
Reiko: "*ohohoho*, what do we have here? It
looks like I'm famous already~"