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Adjective: ludicrous  loo-du-krus
  1. Broadly or extravagantly humorous; resembling farce
    "ludicrous green hair";
    - farcical, ridiculous, ridic [informal]
  2. So unreasonable as to invite derision
    "it is ludicrous to call a cottage a mansion";
    - absurd, cockeyed, derisory, idiotic, laughable, nonsensical, preposterous, ridiculous

See also: daft, dumb, foolish, humorous, humourous [Brit, Cdn, non-standard], stupid

Encyclopedia: Ludicrous