loosen one's collar

idiom

: to unbutton the top button of one's shirt

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loosener
loosen one's collar
loosen one's grip/hold
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“Loosen one's collar.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/loosen%20one%27s%20collar. Accessed 5 Jul. 2025.

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