grey pound
n.— «There’s the pink pound (free-spending gay shoppers), the green pound (eco-consumers) and the recently-identified brown pound (ethnic minorities have money, marketers have discovered ). Before all that was the grey pound—a cliché of the advertising industry since at least the 1970s, according to Reg Starkey, a veteran adman and creative consultant at agency Millennium Direct.» —“Ad nausea hits the grey market” by James Arnold BBC News Nov. 30, 2004. (source: Double-Tongued Dictionary)
Further reading
Brian from Lafayette, Indiana, wonders why chicken is abbreviated CHX in the restaurant industry. Using X as a substitute or shortener has a long history. Medieval scribes sometimes drew a line through the final stroke of an abbreviated word. This...
Penny in Savannah, Georgia, recalls that her father, a Navy veteran who served in the South Pacific, would say of someone who was clueless or didn’t know what he was talking about: That person doesn’t know if he’s punched, bored...