Underpants are a piece of clothing worn under your regular pants or shorts, right against your skin. They're also called underwear, and people wear them for comfort, hygiene, and support.

Different styles exist for different needs and preferences. Some are snug and fitted, like briefs or boxer briefs, while others are looser, like boxers. Athletic underpants might have special fabric that keeps you cool during sports, while everyday ones focus on comfort.

You'll find underpants mentioned in stories when characters get caught in embarrassing situations, like when someone's regular pants rip or fall down. In real life, choosing comfortable underpants that fit well matters for long school days or active play.

The word sounds a bit childish or old-fashioned to some ears. Many people just say “underwear” instead, while others might say “boxers” or “briefs” to be more specific. British English speakers often say “pants” for what Americans call underpants, which can cause amusing confusion since Americans use “pants” to mean regular trousers.