noun
sagging pants; wearing pants low on the hips
Slang abbreviation of 腰パンツ or 腰パンツスタイル. Refers to the fashion of wearing trousers so low that the waistband sits on the hips, often exposing underwear. Can describe the style itself or pants worn that way.
あの高校生はいつも腰パンで、ベルトをしていない。
That high school student always wears his pants sagging and doesn't wear a belt.
腰パンは90年代のストリートファッションの一つだった。
Sagging pants were part of 1990s street fashion.