Cachinnator

The Century Dictionary and Cyclopedia
  • noun. One who cachinnates; one who indulges in loud or immoderate laughter.
    • Wiktionary, Creative Commons Attribution/Share-Alike License
  • noun. One who laughs loudly and immoderately.
    • Word Usage
    "Don't be such a "cachinnator" -- a person who laughs too loud or too much."
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