From the 《
后汉书·
李固传》 (Book of the Later Han, Biography of Li Gu): at the emperor's funeral, while everyone wept, Li Gu 'powdered his face, scratched his head and posed' (
胡粉饰貌,
搔头弄姿) instead of mourning — fixing himself up at a moment of national grief. The phrase has carried a sneer ever since.