The act of vomiting; expelling the contents of the stomach through the mouth.
From 'barf' (onomatopoeia derived from the sound of vomiting), with the suffix '-ing' creating either the gerund noun or the present participle verb form.
The word 'barf' is genuinely onomatopoetic—it imitates the actual sound people make when vomiting, which is why it feels so informal and visceral!
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