informal housing
n.— «“So with a shortfall as big as that, is it any surprise that the prices have sky-rocketed and informal housing has grown beyond control?” he asks. Informal housing is estate agents’ parlance for slums, in which more than 60% of the city’s 18 million people live.» —“Mumbai houses priced out of market” by Monica Chadha in Mumbai, India BBC News Nov. 11, 2006. (source: Double-Tongued Dictionary)
Further reading
Ophelia in Johnson City, Tennessee, wonders about the exclamation her great-grandmother often used when something surprised her: Cat bristle! That may be her own version of a minced oath, although it fits with the idea of how a cat’s tail might look...
When there’s no evening meal planned at home, what do you call that scramble to cobble together your own dinner? Some people apply acronyms like YOYO — “you’re on your own” — or CORN, for “Clean Out your Refrigerator...