磨破嘴皮 mó pò zuǐ pí

mó pò zuǐ pí set phrase to talk until one is blue in the face
Domain: Modern Chinese 现代汉语
Notes: (CC-CEDICT '磨破嘴皮')

Contained in

• 磨破嘴皮子 to wear out one's lips; to talk until one is blue in the face; to repeat again and again