Informal slang for Calvin Klein underwear, used as a shorthand brand reference. The term gained cultural traction through the brand's iconic advertising campaigns featuring celebrities and models in minimal clothing. Using 'Calvins' rather than 'Calvin Kleins' signals familiarity with the brand and a casual designer-label awareness. It functions similarly to how 'Levis' refers specifically to that brand's jeans without any further explanation needed.
He was lounging around in just his Calvins when the doorbell rang.
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(slang) A pair of men's Calvin Klein underwear.
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