Anti-Christ. Depending on the context, can mean a variety of things.

Second President Brigham Young said that

“every spirit that does not confess that God has sent Joseph Smith, and revealed the everlasting Gospel to and through him, is of Antichrist, no matter whether it is found in a pulpit or on a throne“ (Discourses of Brigham Young, 435).

Apostle Mark E. Peterson said,

“Every force now corrupting America is a form of anti-Christ. Criminality is anti-Christ. Immorality is anti-Christ. Drunkenness is anti-Christ. Rioting, pillaging, and anarchy likewise are anti-Christ. Robbery, assault, and murder are all anti-Christ. Deception, duplicity, perjury, and covetousness are anti-Christ. The distribution of pornographic material that corrupts the morals of young and old alike is anti-Christ. And so is every other force destructive of the high principles that have made America great” (Conference Reports, October 1967, 67).“

And Apostle Bruce McConkie said that

“an antichrist is an opponent of Christ; he is one who is in opposition to the true gospel, the true Church, and the true plan of salvation. (1 John 2:19; 4:4-6.) He is one who offers salvation to men on some other terms than those laid down by Christ (Mormon Doctrine, 1966, 39-40).