an incompetent (/incapable)person ❍ 昔羊叔子有鹤善舞，尝向客称之。客试使驱来，童毛蒙毛不肯舞。(刘义庆《世说新语·排调》)Previously,Yang Hu had a crane which was skilled at dancing. One time Yang praised it to a guest,but after the guest arrived,when Hu tried to drive it forward,it made a flurry of feathers but would not dance.