arse-grass
n.— «They sported glittering head-dresses made from bird of paradise feathers, and round their waists they wore grass kilts, known somewhat cheekily in Papua New Guinea’s Pidgin English as “arse-grass.”» —“Deadly twist to PNG’s tribal feuds” by Nick Squires BBC News Aug. 25, 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...