Knock-off; noun: a copy or imitation of something popular. Knock off; transitive verb: to do hurriedly or routinely. Meeting both definitions is "Vampire Academy," a tween-targeted novel franchise penned by Richelle Mead, which has been adapted to the big screen as a lazy, deja-vu-inducing mess. Director Mark Waters takes the high school clique bitchiness of his previous film "Mean Girls" and drops it into a "Harry Potter"-style boarding school of magic, then tosses in the good-vampire-versus-bad-vampire lore and histrionically romantic teens from the "Twilight" series.