Definition from Wiktionary, the free dictionary
Y-fronted (not comparable)
- (Britain) Having a Y-shaped seam, as Y-fronts do.
1975, George MacBeth, The Samurai, page 54:
- Underneath he was wearing white Y-fronted underpants.
- (Britain) Wearing Y-fronts.
2007, Jackie Clune, Man of the Month Club, page 18:
- Squeezing open the kitchen door, Amy came face to face with Greg's baggy Y-fronted backside. 'Greg! Amy's here!' shouted Sophie, too late.