A man who will, or likes to have vaginal intercourse or oral sex with a woman who is menstruating.
Mary: Got laid last night.
Lisa: I thought you had your period.
Mary: Yeah, but Tom's a real blood hound.
The act of a male putting his balls over someone's face making the face have droopy features (eyes, ears) like a Blood Hound Canine.
I totally gave a blood hound to Zak when he passed out last night.