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
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