in short, it's a combination of "bam" and "retard"... making a "bamtard" somebody who is stupid (retarded) enough to like bam. can also be somebody who freakishly obsessed in the teenybopper form.
Person 2: Then you must like Bam too, right?!
Person 1: Well I dont hate him, he's not bad..just not the greatest.
Person 2: BAMTARD!!!
Person 1: No, I'm not. But that teenybopper is::points to girl wearing a heartagram shirt calling it a "bamagram" and blabbering about how hott Bam is::
I would just like to point out that cKy rocks and you don't have to like Bam to like cKy. Bam is just the brother of the drummer. That's it. I hate Bamtards because they try and dress like him and talk like him and they think he has the coolest most random show ever, but it's a scripted show. I pretty much hate Bam Margera because he is ruining the name of cKy.
I almost killed that person.
We call BAMTARDS all the idiot/retarded loyal followers who believe Bam created these bands or owns them for that matter. A bamtard will love HIM, Cky and will worship the heartagram (that he will call the bamagram) without even knowing what it stands for. (Bam unfortunately is a huge self-centered copycat- he was copying jackass' jhnny knoxville and now is copying his style from finnish rockstar Ville Valo). Some bamtards actually attend shows only in the hope of cathing him over there.... A bamtard loves Bam either because he is SO cool or SO very hot) and wishes he could either become him or marry him.
Bamtards should be shot.