a term used to describe a situation in which any person involved in a blow job (or blowjob) gets a bloody nose. This term could also be applied to any situation in which blood is involved in any way with the blow job.
"This dude over here just got a blood job. Check out all of that blood on him. Let us laugh heartily together now."
usually preformed in the vampire world and in vampire media, a bloodjob involves a mortal girl or guy biting into a vampire through the skin, usually the arm or neck, and sucking the resulting gusher, resulting in heightened arousal of both parties. seen frequently in the HBO series True Blood.
Sookie gives a great bloodjob.
My girl wouldn't give me a bloodjob, so I drained her instead.