贻笑大方

Explanation: Yi Xiao a joke; generous originally referred to people who understand the road, or after refers to knowledgeable people with expertise. Refers to insiders joke. 　　Usage: Partial official; as predicate, object, attribute; containing derogatory, used to be shy 　　Source: "Zhuangzi Qiu water" I laughed in a long and generous family. " 　　Examples: To pass by your old state, we must Dengtang ask for advice; knowledge of short-sighted, but ashamed, afraid that - that it dares not venture into the Ye. ★ Qing Li Ruzhen "Flowers in the Mirror" Fifty-second back Thesaurus:  make a laughing stock of oneself before experts