strap-hanger (n.)youdaoicibaDictYouDict[strap-hanger 词源字典]
also straphanger "rider on a street-car, elevated-train, bus, or subway," 1901, from strap (n.) + hanger. In reference to the hanging straps built in to cars and meant to be grasped for balance by those without seats.[strap-hanger etymology, strap-hanger origin, 英语词源]