J. Random: /J Rand'm/ N. [generalized From {J. Random Hacker}] Arbitrary

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: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. It means roughly
`some particular' or `any specific one'. "Would you let
J. Random Loser marry your daughter?" The most common uses are
`J. Random Hacker', `J. Random Loser', and `J. Random Nerd'
("Should J. Random Loser be allowed to {gun} down other
people?"), but it can be used simply as an elaborate version of
{random} in any sense.
-- The AI Hackers Dictionary