In my book just because you workout doesn't make you a meathead its mainly about the personality. For instance Travis is a meathead he's bland,dull and to be perfectly honest offers nothing to the show, he's a lump of meat. However I wouldn't call Sam a meathead as he seems relatively smart to me.Not really related to BB but.... I find this whole "meathead" agenda very odd.
It seems you can't work out and look good without getting labelled a "meathead" in a negative manner.