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Adjective: uproarious  ,úp'ro-ree-us
  1. Uncontrollably noisy
    "They were having a uproarious time when I saw them";
    - rackety, rip-roaring
  2. Marked by or causing boisterous merriment or convulsive laughter
    "uproarious stories";
    - hilarious, screaming

See also: humorous, humourous [Brit, Cdn, non-standard], noisy