:old fart: n. Tribal elder. A title self-assumed with remarkable
frequency by (esp.) USENETters who have been programming for more
than about 25 years; often appears in {sig block}s attached to
Jargon File contributions of great archeological significance.
This is a term of insult in the second or third person but one of
pride in first person.
-- The AI Hackers Dictionary
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....