Expressing contempt or mockery; characterized by sneering or mocking laughter.
Present participle of 'fleer' used as an adjective, describing something or someone displaying the quality of mockery or scorn, following the pattern of -ing adjectives like 'amusing' or 'surprising'.
A 'fleering grin' is more sinister and contemptuous than a 'sneering grin' because 'fleer' carries that Old Norse origin of baring teeth in disdain—it feels more animal and visceral.
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