The act of insterting a man's penis into a woman's vagina during her menstrual period. When his penis is covered in blood, the man insterts his penis into the woman's anus. When he removes his penis, it looks as if the woman was shot and is bleeding.
Mandy was cranky but Luca cheered her up when he gave her a Chicago Bullethole.
An insult akin to "butthead;" reserved for people who are fully convinced that their every opinion is correct, even when confronted with hard evidence to the contrary.
TerryGross: "What are your inspirations for your character?"
Stephen Colbert: "Well, the slickness of Anderson Cooper, obviously Bill O'Reilly's pomp, and the incurious bullethead that is Sean Hannity."