blunderer 

英汉解释

n. 轻率粗心的人；犯愚蠢错误的人

同义词

n. botcher，bumbler，fuckup，fumbler

参考例句

1. John is a bit of a dangerous blunderer.
约翰是一个很危险而且经常坏事的人。
2. Gordon Brown is himself part deep-thinking ascetic, part inadvertent blunderer, and he risks making the same mistake, in more than one way.
戈登
3. Accident may put a decisive blunderer in the right, but eternal defeat and miscarriage must attend the man of the best parts, if cursed with indecision.
果断之举可能使轻率者意外获得成功，但优柔寡断必定使佼佼者遭受战败。

英英解释

n.
  1. someone who makes mistakes because of incompetence

网络释义

blunderer
轻率; 轻率粗心的人;