A few months ago, I was walking through a part of Delhi whose two letters, if said without context, still haunt unsuccessful UPSC aspirants. GK. Thankfully not General Knowledge, but Greater Kailash, one of the city's richest addresses.
In fact, Delhi has become so rich that after GK 1 and GK 2, it eventually needed a GK 3, perhaps to provide a unique form of EWS (Extremely Wealthy Section) reservation for the expanding rich.