Y-FRONTS
Meaning of Y-FRONTS in English
™ noun
[ pl. ] ( BrE ) men's underpants , with an opening in the front sewn in the shape of a Y upside-down :
a pair of Y-fronts
Oxford Advanced Learner's English Dictionary.
Оксфордский английский словарь для изучающик язык на продвинутом уровне.
2005