Definition of "muttering" []

• Present participle of mutter. (verb)
• Something which is muttered (noun)
• A rumour. (noun)

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• "Tina gets worried after she hears Justin muttering something about wardrobe malfunctions …"
• "On his way out, he used two profanities in muttering aloud that Ruff should mind his own business."
• "I heard a muttering from the wheelhouse, and made out the word "Slagfinn" — not at all a good thing."