hypergelast

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• hypergelast — noun someone who laughs excessively. America had become a laughing nation, a country of frivolists and hypergelasts, a culture dangerously out of control. Henry Jenkins; What Made Pistachio Nuts?; Columbia University Press; 1992. Syn: cachinnator …   Wiktionary

• cachinnator — noun One who laughs loudly and immoderately. Syn: hypergelast Ant: agelast See Also: cachinnate, cachinnation …   Wiktionary

• agelast — noun one who never laughs; a mirthless person Ant: cachinnator, hypergelast …   Wiktionary