1.to do (also go for) the nobby: to act as a person of wealth or sophistication. Obsolete.
ΚΠ
1857 J. E. RitchieNight Side of London 60 We pay sixpence if we take a seat in the body of the hall, and ninepence if we do the nobby and ascend into the balcony.
1863 E. FarmerScrap Bk. (ed. 3) 75 He went for the nobby, he heeded not price.