A insult that compairs a persons brain to a loaf of bread, in reality it means that a person isn't intelligent and that they, in fact, are not only a idiot, but a ungodly one at that. and thus being called bread-headed is considered a great offense, NOTE: this word has been recently created by the students of high schools and those who frequent bars or clubs.
"Steven is a total Bread-headed fool for thinking that."