A champion or winner, or the sound of chewing food noisily.
Short for 'champion,' which comes from Old French and Latin 'campio' meaning 'warrior' or 'fighter.' The chewing sense developed as an onomatopoeia, mimicking the sound of teeth grinding together.
The same word has two totally different meanings—a person who wins and the sound of munching—and came from different sources! This happens surprisingly often in English when words sound the same but evolve separately.
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