從 Microsoft Encarta 抄來的:

yup·pie (noun)
young professional: a young educated city-dwelling professional, especially when regarded as materialistic

[Late 20th century. Coined from y(oung) u(rban) p(rofessional) , on the model of hippie and yippie.]

簡單翻譯就是 "都市裡的年輕專業人士"
同時帶著有崇尚物質享受的意思