啮檗吞针

Explanation: Bo: commonly known as Cork, bitter taste. Nie Bo: food Huang Bo, compared the taste of food, such as the pain of Huang Bo. Swallow Needle: The needle is swallowed, the food analogy is extremely difficult to import. Descriptions of food were hard to swallow. 　　Source: TANG Kang Pian "Li Shijun": "ice until dinner, all _set_ a spoonful of the mouth, each phase ogle a long time, Bo Nie salt if swallowed needle."