Errorist

Definition: Someone who repeatedly makes mistakes. Says stuff he believes is true, but anyone with common sense can see he's wrong. A dumbass.

某人老是不停的犯错。说着他自认为正确的话，但是任何有常识的人都会知道他是错的。真是个笨蛋。

E.g. Bush is talking on tv again. What a fucking errorist.

布什又在电视上讲话了。真是个大笨蛋。