Is Jesus a sacrament?

Yes, Jesus Himself is the Holy Eucharist, one of the Sacraments of Initiation. Jesus, during the Last Supper on Maundy (or Holy) Thursday, offered His Body and Blood under the signs of bread and wine. This process is calledtransubstantiation and the only time transubstantiation happens is in the Consecration. So, yes, Jesus is the Blessed Sacrament, The Holy Eucharist.