Rah (slang)
Rah or yah is a pejorative term referring to a stereotypical affluent young upper class or upper-middle class person in the United Kingdom. The term "rah" originated as a contraction of "Hoorah Henry" (sometimes "Hoorah Henries and Henriettas"), a pejorative description of a social stereotype similar to the Sloane Ranger stereotype also recognised in the UK, though a rah is generally younger, typically around university age (18–25), and less associated geographically with London.