BeastBeast, in the English language, is most often used as a synonym for animal.
The Beast is also a figure who appears in Christian millennial end times prophecy from the Book of Revelation. Some believe he is synonymous with the Antichrist, while others say the Beast is the Antichrist's independent ally. The Beast is associated with the number 666, the Number of the Beast. The magician Aleister Crowley bestowed this title upon himself as a nickname.
Beast was one of the first successfull alternate reality games, published by Microsoft.