Soft, fluffy, or puffy in texture or appearance.
Variant or dialectal form related to 'fluffy,' itself from 'fluff' (1790s, meaning soft light material). The double-f construction and -y suffix are typical of English adjective formation.
This word is a perfect example of onomatopoeia hiding in plain sight—the 'ff' sound mimics the sensation of something soft and airy, which is why so many fluffy-related words cluster around that sound pattern.
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