deep dive
n.— «It has been conducting extensive surveys (called “deep dives,” in polling parlance) of 2,000 people in the Baltimore/Washington region this summer.» —“Survey takes pulse of city and beyond” by Doug Donovan Baltimore Sun (Md.) July 3, 2005. (source: Double-Tongued Dictionary)
Further reading
Cat hair may be something you brush off, but cat hair is also a slang term that means “money.” In the same way, cat beer isn’t alcoholic — some people use cat beer as a joking term for “milk.” And imagine walking on a...
Have you ever googled your own name and found someone else who goes by the very same moniker? There’s a word for that: googleganger. Plus, the language of hobbyists and enthusiasts: If you’re a beekeeper, perhaps you call yourself a...