ㄅㄨˊˋㄌㄧㄤˋbúzìliàng

bùzìliàngㄅㄨˋ ㄗˋ ㄌㄧㄤˋ
  1. 過於高估自己能力 大將絕非不自量」。

not take a proper measure of oneself, to overrate one's own abilities