Men's Trunks
Frun fact: So what defines a men's trunk? In a nutshell (yes, pun intended), the leg openings of trunks are squared off similar to a boxer. Unlike unlike boxer briefs which tend to have a longer inseam, trunks have shorter or even no inseams. In many countries aside from the US, the terms "boxer brief" and "trunks" are used synonymously.
