Forcefully expelling gas from the stomach through the mouth with a loud sound, or releasing something in bursts.
From Middle English 'belchen,' from Old English 'bealcan.' The word is onomatopoetic, imitating the actual sound of belching.
In some cultures, belching after a meal is considered polite and means you appreciated the food—it's literally the opposite of rude, which shows how much 'manners' change across the world!
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