A person who guts and cleans fish by removing their internal organs, or someone who cheats or tricks others.
From 'gip' plus the agent suffix '-er,' indicating someone who performs the action of gutting fish or, in slang use, someone who cheats.
In working-class communities near fishing ports, 'gipper' was a respected trade—but the word's slang meaning for 'cheater' shows how working-class occupations sometimes got turned into insults.
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