belay dog
n.— «BELAY DOG or SLAVE: An affectionate term for non-climbers willing to handle the safety rope all day.» —“It’s ‘mutants’ against the ‘rock’ at new indoor climbing center” by Rick Ansorge Colorado Springs Gazette Telegraph (Colo.) Feb. 15, 1992. (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...