Related:

• J. Random: /J rand'm/ n. [generalized from {J. Random Hacker}] Arbitrary
  ordinary; any one; any old. `J. Random' is often prefixed to a noun to make a name out of it....
• andom adj. 1. Unpredictable (closest to mathematical definition)
  weird. "The system's been behaving pretty randomly....
• JR[LN]: /J-R-L/, /J-R-N/ n. The names JRL and JRN were sometimes used as example names when discussing a kind of user ID used under {{TOPS-10}} and {WAITS}
  hey were understood to be the initials of (fictitious) programmers named `J....
• fred: n. 1. The personal name most frequently used as a {metasyntactic variable} (see {foo}).
  Allegedly popular because it's easy for a non-touch-typist to type on a standard QWERTY keyboard....
• J. Random Hacker /J rand'm hak'r/ n. [very common] A mythical figure like the Unknown Soldie
  he archetypal hacker nerd. This term is one of the oldest in the jargon, apparently going back to MIT in the 1960s....
• J. Random Hacker: [MIT] /J rand'm hak'r/ n. A mythical figure like the Unknown Soldie
  he archetypal hacker nerd. See {random}, {Suzie COBOL}....
• fred n. 1. The personal name most frequently used as a metasyntactic variable (see foo).
  Allegedly popular because it's easy for a non-touch-typist to type on a standard QWERTY keyboard....
• ome random X adj. Used to indicate a member of class X, with the implication that Xs are interchangeable.
  I think some random cracker tripped over the guest timeout last night....
• Suzie COBOL: /soo'zee koh'bol/ 1. [IBM: prob. from Frank Zappa's `Suzy Creamcheese'] n.
  A coder straight out of training school who knows everything except the value of comments in plain English....