A statement used by relativists (not usually in the sense of Einsteinian physics, although they sometimes use this phrase, but by the philosophers, people like Derrida etc). It is used to state their belief that everything we have: morality, logic and artistic merit are all relative concepts, relative to who we are and what we have done; there is no absolute morality, for instance.

This is kind of a ridiculous position. Particularly, it is so, because "Everything is relative" is an absolute, not a relative statement. This effectively makes it a self negating statement and thus opens a whole can of worms on the topic.