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1.
The Internet Antichrist was a title originally assigned to the player Snax upon completion of 666 hours logged on steam for the game Blacklight Retribution. He was banned shortly after for calling the BLR forum admin a kike amongst a list of complaints from literally a hundred plus other in-game users.

The term has since been used as a title for "Master Fuckery," aka people who have exceptional skill in mentally obliterating their competition.
John was raging so hard during that LoL match you'd think he was arguing with the Internet Antichrist.
by CaligulaHaxor November 29, 2013