The word "bloody" is often used as an expression of emphasis or frustration. It can also describe something that involves or is covered in blood. Full definition
One of the most common medical complaints in the small animal veterinary clinic is the history of bloody urination in our pets. (1800petmeds.com)
A couple of fist fights result in bloody noses and one student receives a beating with a wooden paddle after breaking school rules. (parentpreviews.com)
They spent the entire night and today vomiting with bloody diarrhea. (itchmo.com)