Noun;
The act of Satan or higher demon urinating onto a virgin's head or breasts to induce erotic pleasure. Similar to a golden shower, but involving demonicpiss.
When Julie celebrated her 18th birthday, she received an unholy shower from Satan himself.
The act of ejaculating in your partner's cupped hands, where you then dip your finger into said cum cup, and use this finger to draw a cross on their forehead.
Person 1: "Bro this person at church is such a freak, they asked for an unholy baptism!"