Referring to the Blessèd Sacrament is to refer to the consecrated bread and wine which become Jesus’ Body and Blood in Holy Eucharist/Communion. The reasoning behind this terminology relates to sacramental theology, which states that the bread and wine are changed into Jesus’ presence. It would therefore not be correct to refer to “bread” and “wine”. “Body” and “Blood” would be correct, but confuses many. To refer to the Blessèd Sacrament makes clear, therefore, that we believe that Jesus is present.
Many people only use this terminology when referring to Jesus’ presence in the Reserved Sacrament in the tabernacle or as carried/displayed in a monstrance or pyx.