old fart

from Jargon File (4.4.4, 14 Aug 2003)

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.

from The Free On-line Dictionary of Computing (8 July 2008)

old fart

   Tribal elder.  A title self-assumed with remarkable frequency
   by (especially) {Usenet}ters who have been programming for
   more than about 25 years; often appears in {sig blocks}
   attached to {Jargon File} contributions of great archaeological
   significance.  This is a term of insult in the second or third
   person but one of pride in first person.

   [{Jargon File}]

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