as in quiets (down)
to stop talking
the schoolboy ordered his mates to belt up about the prank
Synonyms & Similar Words
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Antonyms & Near Antonyms
Example Sentences
Recent Examples of Synonyms for belts up
Verb
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Sweeping views over Hyde Park and expert soundproofing that hushes those busy London street horns.
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The top itself is an eight-layer cloth construction that satisfyingly hushes the cabin when raised.
Verb
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Geothermal and wind energy require expensive infrastructure, and hydro dries up in the summer.
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Once your agency or comms team gets that reputation, earned media dries up fast.
Verb
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Annette finally goes into the ocean and shuts up.
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But establishing your lead funnyman as someone who just shuts up and stares blankly ahead isn’t a recipe for sustainable comedy.
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“Belts up.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/belts%20up. Accessed 1 Jul. 2026.
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