raffyoudaoicibaDictYouDict[raff 词源字典]
"Worthless material; trash, rubbish, refuse. Also occasionally: miscellaneous material, odds and ends. Now Scottish and English regional (chiefly northern )", Late Middle English; earliest use found in Robert Mannyng (d. c1338), poet and historian. Apparently partly short for riff and raff one and all, everyone, everything, and partly (especially in later use) shortened from riff-raff. Compare raffle. However, the relationship between the senses of the word presents various uncertainties.[raff etymology, raff origin, 英语词源]