Well, it's not poetv "elementary school band cover of Metallica" terrible. My ears don't bleed when I hear one of their songs.
But I do kinda consider bland, unimaginative music to be terrible. At least the truly terrible bands are inadvertently creating something noteworthy. Oasis? Not so much.
Yeah, I understand. I guess I just think of some really unlistenable crap when I think terrible. And I guess I'm biased, because one of my first crushes was with a girl with pixie cut who loved the hell out of this band. I guess it makes me feel young, somehow.