不成器

Explanation: Device: a person's measure of talent. Objects can not be useful. Temperament for a person more than mediocre, can not be successful, there is no breath. Sometimes referred to do not learn, stoop. 　　Usage: Verb-object type; as predicate, object, attribute; containing derogatory 　　Source: Han Dai Holy "Book of Rites Record of Learning": "Jade is not cut, not a device; people do not learn, do not know." 　　Examples: Zhesi ~, how it is here. (Ming Shinai "Tales of" Fourteenth back)