Related:

• ig quote /sig kwoht/ n. [Usenet] A maxim, quote
  proverb, joke, or slogan embedded in one's sig block and intended to convey something of one's philosophical stance, pet peeves, or sense of humor....
• ig virus: n. A parasitic {meme} embedded in a {sig block}.
  There was a {meme plague} or fad for these on USENET in late 1991....
• ig block: /sig blok/ [UNIX; often written `.sig' there] n.
  Short for `signature', used specifically to refer to the electronic signature block that most UNIX mail- and news-posting software will {automagically} append to outgoing mail and news....
• fool file, the: [USENET] n. A notional repository of all the most dramatically and abysmally stupid utterances ever.
  An entire subgenre of {sig block}s consists of the header "From the fool file...
• ig virus n. A parasitic meme embedded in a sig block. There was a
• ig block /sig blok/ n. [Unix; often written `.sig' there] Short for `signature'
  used specifically to refer to the electronic signature block that most Unix mail- and news-posting software will automagically append to outgoing mail and news....
• warlording: [from the USENET group alt.fan.warlord] v.
  The act of excoriating a bloated, ugly, or derivative {sig block}....
• doubled sig: [USENET] n. A {sig block} that has been included twice in a {USENET} article or, less commonly, in an electronic mail message.
  An article or message with a doubled sig can be caused by improperly configured software....
• ICBM address: n. (Also `missile address') The form used to register a site with the USENET mapping project includes a blank for longitude and latitude, preferably to seconds-of-arc accuracy.
  This is actually used for generating geographically-correct maps of USENET links on a plotte...