firm base
n.— «Half of the firm base (the military term for a small, austere outpost) is occupied by the Marines, while half is for the Iraqis.» —“Iraq Journal: It’s all Arabic to them” by Julian E. Barnes in Fallujah, Iraq U.S. News & World Report July 1, 2005. (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...