1) An utterly horrible misspelling of the word "Satan". Anyone who uses the word "satin" in any other context besides, "Oh, what lovely satin sheets you have!" should not be allowed the privilege of breathing and shout be shot, or beaten to death with a pentacle. they seem to like those a lot. (The worst part is that I've seen satan spelled with an I more than I've seen it the correct way.
2) Yet another sign that humanity is doomed.
1) All hail Satin! But first, I have to ask my mom if it's alright.
2) Satin: Sign of the apocalypse