In the mainstream, this is the cup Jesus used at the Last Supper. In post-Biblical traditions, Joseph of Arimathea is said to have taken the cup and collected some of the blood of Jesus from the cross, (a tradition happily omitted by Mel Gibson in his movie The Passion). In this tradition Joseph then brought the cup with him to Briton. Esoterics believe the Holy Grail means "royal blood" and refers to the descendants of Jesus and Mary Magdalene.
The cup or platter that, according to medieval legend, Christ used at the Last Supper and caught his blood as he hung from the cross. It was said to have been brought to Britain, and later became the object of knightly quests--only those godly enough, noble enough, and those with a true heart were said to be worthy of finding the Grail.
"Holy Grail" is a song performed by the Australian band Hunters & Collectors on their 1992 album Cut. With lyrics referring to popular Holy Grail mythology, the song is an anthemic single inspired by Napoleon's march to Russia in 1812, but also referencing the Hunters & Collectors' flagging attempts to "crack" the American market.