from
Jargon File (4.4.4, 14 Aug 2003)
J. Random Hacker
/J rand'm hak'r/, n.
[very common] A mythical figure like the Unknown Soldier; the
archetypal hacker nerd. This term is one of the oldest in the jargon,
apparently going back to MIT in the 1960s. See {random}, {Suzie
COBOL}. This may originally have been inspired by `J. Fred Muggs', a
show-biz chimpanzee whose name was a household word back in the early
days of {TMRC}, and was probably influenced by `J. Presper Eckert'
(one of the co-inventors of the electronic computer). See also {Fred
Foobar}.