Someone who,according to the bible, is in opposition to Christ, will spread hatred, will spread evil, and, will rule part the world....which means that someone that you say, "Your rulez!" can also apply to this definition as long as he spread hatred, and evil. It is said that these antichrists will rule the world until the second coming of Christ....
Possible antichrists, according to critics and opinions: Marilyn Manson,Hitler, etc etc...but you can find them anywhere...let's say North Korea...
Let him who hath understanding reckon the number of the beast for it is a human number, its' number is Six hundred and sixty six."
Revelations Ch. XIII v.18
he is the son of lucifer and is born as the incarnate human form of evil!
he whom bears the mark of 666 on his head and is known in the new and old testemants (spelling?) as "the beast"
he is a false prophet and does the work of his father to erradicate the word of god!