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English definition of “Y-fronts”

Y-fronts

noun [plural] uk   /ˈwaɪ.frʌnts/ UK trademark us  
a piece of underwear for men and boys, covering the area between the waist and the tops of the legs, with an opening at the front in the shape of an upside-down YUnderwear
(Definition of Y-fronts from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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