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
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