k.p. (n.)youdaoicibaDictYouDict[k.p. 词源字典]
"kitchen duty," 1935, apparently short for kitchen police (duties), itself attested from 1933 as part of Boy Scouting and other camping activities; the expression's sense sometimes shifted to kitchen patrol (1940) during World War II.[k.p. etymology, k.p. origin, 英语词源]