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.
That high school student always wears his pants sagging and doesn't wear a belt.
Sagging pants were part of 1990s street fashion.
Abbreviation of 腰パンツ (こしパンツ), literally 'hip pants'. The term emerged in Japanese youth slang to describe the sagging pants fashion.