shaver (n.)youdaoicibaDictYouDict[shaver 词源字典]
"one who shaves," early 15c., agent noun from shave (v.); sense of "fellow, chap" is slang from 1590s. Meaning "shaving tool" is from 1550s. Mad shaver (1610s) was 17c. slang for "a swashbuckler, roisterer."[shaver etymology, shaver origin, 英语词源]