croupier (n.)youdaoicibaDictYouDict[croupier 词源字典]
"one who clears the winnings from the table in gambling," 1731, from French croupier (17c.), originally one who rides behind another, on the croup or "rump" of a horse (a word of Germanic origin); hence extended to any one who backs up another; a "second."[croupier etymology, croupier origin, 英语词源]
swamper (n.)youdaoicibaDictYouDict
1735, "one who lives in a swampy district," from swamp (n.). Meaning "workman who clears a lumber road through swamp or forest" is 1857, American English; meaning "all-purpose assistant in a restaurant or saloon" is from 1907.