The term, "Body of Christ" is an expression of unity between Christ, his followers, and the Church.

Body of Christ is a term of Christian theology, implicitly traceable to Jesus's statement at the Last Supper that "This is my body" in Luke 22:19-20, and explicitly used by the Apostle Paul in I Corinthians 12:12-14.

The first meaning that the Roman Catholic Church attaches to the expression "Body of Christ" is the Church. According to the Catechism of the Catholic Church, "the comparison of the Church with the body casts light on the intimate bond between Christ and his Church. Not only is she gathered around him; she is united in him, in his body.

Three aspects of the Church as the Body of Christ are to be more specifically noted: the unity of all her members with each other as a result of their union with Christ; Christ as head of the Body; and the Church as bride of Christ."

http://en.wikipedia.org/wiki/Body_of_Christ

The current comments do a fantastic job of illustrating the common understanding of the (cannibalistic? anthropophagic?) eucharist.

The philological scholar John Allegro studied the dead sea scrolls and concluded that the entire mythos of Jesus was crafted as an elaborate concealment of an ancient mushroom cult. So it could be said that what Christians really mean (though they may know it not) is ... well ...

You can read about it here: http://www.mediafire.com/?m0mdnljmfuj

Hear a funny song about it here: http://www.youtube.com/watch?v=BtiMw0-akAM

Or you could pretend that this is the voice of the devil and that there's no way 'Jesus' could be a psychedelic fungus. :)

Either way, I hope this gives you an interesting idea to ponder.

As Vesuvius rightly pointed out " Body of Christ" is Christian terminology that can be traced back to Jesus at the Last Supper.

In the Catholic church it is the words used by the priest during the Eucharist when the congregation go to the altar to receive 'Communion' or unity with Christ in the form of the 'Eucharist'. Around the age of 7 or 8 children are prepared for their "First Holy Communion" which involves repenting their sins at confession, fasting for an hour before receiving the "Body of Christ", looking at the Eucharist and saying "Amen" after the priest says "Body of Christ" and going back to the pew and speaking to Jesus, after coming into Communion with him. Catholics partake of this receiving of the "Body of Christ" every Sunday during the mass.