Hyper Calvinism is the un-biblical and unscriptural teaching that because God has predestined those whom He wills to be saved (Ephesians 1:1-11, Acts 13:48, etc.,), that no evangelism is necessary (not all hyper-calvinists hold to this view) because God will bring about the salvation of the elect whether or not the Christians preach and teach the gospel message. Therefore, it will deny the necessity of missionary work. It also denies common grace and any form of love that God might have for the unbeliever (see Matt. 5:43-48).
Hyper Calvinism is an affirmation of God's sovereignty to such a great degree that it negates the responsibility of man to preach the gospel to the lost.
Without a need for preaching to the lost there is little concern for the lost, little prayer for the lost, and little attempt to reach the lost.
Biblical Calvinists reject Hyper Calvinism.