khòo-thâu褲頭

underpants

underpants; undershorts; shorts worn externally

English Wiktionary, “褲頭” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E8%A4%B2%E9%A0%AD · confidence: High (Wiktionary, PH/Quanzhou/Jinjiang)