blue-sky
v.— «He insisted he was merely “blue skying” the idea. He swore he had never used the report, which he had promoted while at NIAAA, to solicit loans from banks to build a private treatment center.» —“The Washington merry-go-round” by Jack Anderson, Les Whitten The News (Frederick, Md.) June 11, 1975. (source: Double-Tongued Dictionary)
Further reading
What if, instead of being an inanimate object, a dictionary were alive? That’s the idea behind a lavishly illustrated new children’s book called The Dictionary Story (Bookshop|Amazon) by Oliver Jeffers and Sam Winston. This is part of a...
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...