bumbler

Lula's critics indict him as a lucky bumbler who may have kept Brazil out of trouble but has done nothing to improve its prospects.

卢拉的批评者认为他是人笨架不住运气好，他没给巴西带来麻烦，但也没什么作为。

He is a self-professed expert on everything-he proves to be the classic bumbler.

他自称是什么都是行家，但事实证明他不过是个典型的白痴。