Eating something steadily and usually noisily, often snacking throughout an activity.
Origin unknown, but possibly imitative of the sound of chewing, first recorded in the 1580s. May be related to similar-sounding words across Germanic languages for eating.
Words like 'munching,' 'crunching,' and 'munching' are onomatopoeia—they sound like what they mean—which is why almost every language has its own version of these eating sounds.
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