One who heps or is hep; a person who is hip, aware, or knowledgeable, especially in jazz culture.
From 'hep' (aware, knowledgeable) + '-er' (agent suffix). Related to the 1930s-1940s slang meaning of 'hep.'
A hepper was someone with their finger on the pulse of culture—they knew the latest jazz records, the hottest clubs, and had that indefinable quality of being 'in the know' before everyone else caught on.
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