"Sacrificing chickens to that Baron Saturday"
Baron Samedi
Creative Commons Attribution Share AlikeBaron Samedi - Credit: unforth / Claire H.

Baron Samedi, also known as Baron Saturday, is a Haitian voodoo loa (spirit) of the dead. He is especially powerful in the use of curses and black magic.

Baron Saturday also appears in Terry Pratchett's Discworld novel Witches Abroad.