blog (n.)youdaoicibaDictYouDict[blog 词源字典]
1998, short for weblog (which is attested from 1994, though not in the sense "online journal"), from (World Wide) Web + log. Joe Bloggs (c. 1969) was British slang for "any hypothetical person" (compare U.S. equivalent Joe Blow); earlier blog meant "a servant boy" in one of the college houses (c. 1860, see Partridge, who describes this use as a "perversion of bloke"), and, as a verb, "to defeat" in schoolboy slang. The Blogger online publishing service was launched in 1999.[blog etymology, blog origin, 英语词源]