roach
n.— «Calling a customer with below-average credit a “stiff” or “roach,” is another common put-down. Subprime customers are a viable group of buyers who can give a healthy boost to your gross profits.» —“Watch Your Language at Work” by Jesse Berger Ward’s Dealer Business Feb. 1, 2007. (source: Double-Tongued Dictionary)
Further reading
When an international team of scientists traveled to a research station in Antarctica for six months, the language they all shared was English. After six months together, their accents changed ever so slightly — a miniature version of how language...
What’s the difference between ethics and morality? Between a proverb and an adage? Eli Burnstein’s Dictionary of Fine Distinctions: Nuances, Niceties and Subtle Shades of Meaning (Bookshop|Amazon) helps readers distinguish between such...