loaf (v.)youdaoicibaDictYouDict[loaf 词源字典]
1835, American English, back-formation from loafer (1830). Related: Loafed; loafing.
The term "loafing" is, of course, very vague. Its meaning, like that of its opposite, "work," depends largely on the user. The highly successful quarterback with an E in Greek is a loafer in his professor's eyes, while the idea of the professor's working, in spite of his voluminous researches on Mycenean Table Manners, would excite hoots of derision from the laborer that lays the drains before his study window. [Yale Literary Magazine, May 1908]
[loaf etymology, loaf origin, 英语词源]
tosh (n.)youdaoicibaDictYouDict
"valuables collected from drains," 1852, London slang, of unknown origin.