The Collaborative International Dictionary of English v.0.48:

Moria \Mo"ri*a\, n. [NL., fr. Gr. ? folly.]
   Idiocy; imbecility; fatuity; foolishness.
   [1913 Webster]

The Jargon File (version 4.4.7, 29 Dec 2003):

moria
 /mor'ee?@/, n.

    Like nethack and rogue, one of the large PD Dungeons-and-Dragons-like
    simulation games, available for a wide range of machines and operating
    systems. The name is from Tolkien's Mines of Moria; compare elder days, 
    elvish. The game is extremely addictive and a major consumer of time
    better used for hacking. See also nethack, rogue, Angband.


The Free On-line Dictionary of Computing (30 December 2018):

moria

    /mor'ee-*/ Like nethack and rogue, one of the
   large PD Dungeons and Dragons-like simulation games,
   available for a wide range of machines and operating systems.
   The name is from Tolkien's Mines of Moria; compare elder
   days, elvish.  The game is extremely addictive and a major
   consumer of time better used for hacking.

   [Jargon File]