I can't really see a reason why such a tag is necessary. It is, after all, just butcha-u hooters. Maybe if another artist were to start using the same phrase... but then again, it would be a very lonely tag anyway, with only a handful of posts it presently fits.
Perhaps as an alternative, some sort of tag like slogan parody? That, at least, would be broad enough to be used for other brands as well, if needed.
