Divine slave.  Bandgi means slavery.  Banda means a slave.  The slave is the one who has accepted the slavery of Akal Purakh.  Banda is the one who has accepted the divine slavery of Akal Purakh and when this slavery is accepted then Bandgi starts, this divine slavery starts.  Therefore, the one who accepts this divine slavery and lives under the Hukam of Akal Purakh is called a Banda and His life becomes Bandgi.  There are two things that we can be a slave of, either Maya or God.  If we are not a slave of God then we are a slave of Maya.