shill (n.)youdaoicibaDictYouDict[shill 词源字典]
"one who acts as a decoy for a gambler, auctioneer, etc.," 1916, probably originally circus or carnival argot, probably a shortened form of shillaber (1913) with the same meaning, origin unknown. The verb is attested from 1914. Related: Shilled; shilling.[shill etymology, shill origin, 英语词源]