A person who hunts raccoons or a hunting dog trained to track and chase raccoons; also a raccoon hunter in frontier America.
From coon (raccoon) plus the agent suffix -er, meaning 'one who does.' This term emerged in American frontier vocabulary where raccoon hunting was a common practice.
Raccoon hunting was such a culturally significant activity in early America that it generated its own vocabulary—'cooner' became shorthand for a particular type of frontiersman with specific skills and knowledge.
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