A person who fleers; someone who mocks, sneers, or laughs disrespectfully at others.
From 'fleer' (verb, from Old Norse 'flira') plus the agent noun suffix '-er,' which creates nouns for people who perform an action—a pattern used since Old English.
Creating 'fleerer' shows how English lets us build character types from verbs—a 'fleerer' isn't just someone who mocks once, but someone whose defining trait is contemptuous mockery.
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