石头奶 Traditional form: 石頭奶 Pinyin (reading): shítounǎi Definitions: engorged breasts; rock-hard breasts (resulting from postnatal milk accumulation or complications from breast implants) Characters: 石 - stone, rock, mineral 头 - head; chief, boss; first, top 奶 - milk; breasts; nurse, grandmother Traditional characters: 石 - stone, rock, mineral 頭 - head; chief, boss; first, top 奶 - milk; breasts; nurse, grandmother