Y-Fronts™BrE /ˈwaɪ frʌnts/ 🔊NAmE /ˈwaɪ frʌnts/ 🔊 noun [plural] (BrE) men's underpants, with an opening in the front sewn in the shape of a Y upside-down （前缝呈倒 Y 形的）男内裤◆a pair of Y-Fronts一条前缝呈倒 Y 形的男内裤