黄口孺子

Explanation: Huangkou: Children; Ruzi: children. Often used to ridicule other people young and foolish. 　　Usage: Joint type; as subject, object; containing derogatory, ignorant young people often used to ridicule 　　Source: Ming Luo, "Three Kingdoms" 83 back: "I old men, military forces, not at counter as a yellow mouth Ruzi Yeah!" 　　Examples: This is so like you Huangkou Ruzi, will certainly not know, I is the major generals West Palace fitness differences. (Ming Xu Zhonglin "Gods," the eighty-fourth back) Thesaurus:  sucking child