It means illegitimate, bastard, fraudulent, fake, fake, adulterated. It's not original or it's not authentic.
False, dubious, apocryphal or bastard. It comes from the Latin spurius, a , um where it had the same meaning.
When a personnel action, entity or organization has corrupted his original purpose by illegitimacy, malpractice, or disability; i.e. the Venezuelan National Assembly which fell in 2010.