Just because a person listens to HIM does not make them a "bamtard". there are those of us out there who like HIM and cannot stand the stupid fuckup Ville Valo
hangs out with.
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.
Bamtard is such a stupid word.