B1FF /bif/ [Usenet] (alt. `BIFF') n. The most famous {pseudo}, and the
   prototypical {newbie}. Articles from B1FF feature all uppercase letters
   sprinkled liberally with bangs, typos, `cute' misspellings (EVRY BUDY
   LUVS GOOD OLD BIFF CUZ HE"S A K00L DOOD AN HE RITES REEL AWESUM THINGZ
   IN CAPITULL LETTRS LIKE THIS!!!), use (and often misuse) of fragments of
   {talk mode} abbreviations, a long {sig block} (sometimes even a {doubled
   sig}), and unbounded naivete. B1FF posts articles using his elder
   brother's VIC-20. B1FF's location is a mystery, as his articles appear
   to come from a variety of sites. However, {BITNET} seems to be the most
   frequent origin. The theory that B1FF is a denizen of BITNET is
   supported by B1FF's (unfortunately invalid) electronic mail address:
   B1FF@BIT.NET.

   [1993: Now It Can Be Told! My spies inform me that B1FF was originally
   created by Joe Talmadge , also the author of the
   infamous and much-plagiarized "Flamer's Bible". The BIFF filter he wrote
   was later passed to Richard Sexton, who posted BIFFisms much more
   widely. Versions have since been posted for the amusement of the net at
   large. See also {Jeff K.} --ESR]


Source: The Jargon File