Goofer dust is a concoction of natural ingredients that can be used to cause harm, trouble or even magically kill an enemy. Some historical sources, such as some of the interviews conducted by Harry Hyatt indicate goofer dust can be synonymous with graveyard dirt.
We tend not to equate the two and in most cases find that although Graveyard dirt may be an ingredient within goofer dust, it is not just grave dust or dirt. Often other ingredients are also used to make it (sulphur being another key ingredient.)
Most commonly Goofer Dust is sprinkled upon a path where you know the target will walk. This is accompanied by curses of ill will against the target. It may also be used in the dressing of a curse or hexing candles. Ultimately it is a magicaly charged powder which can be used in a multitude of ways and none of them usually positive. Use your imagination when designing spells made with this product just don't get any of it on yourself in fact I know many Hoodoo practitioners who will only handle it while wearing gloves.