I was looking at that Potter's title, Half-Blood Prince. I was like, why is it not half prince blood, oh wait. But it makes sense, no? Uhhh. Well. No.... Maybe.
Half blood is usually a term for a mixed race person, one Derby, the other GP500. Or, can be in the same race but different caste. In general, a mix.
So I believe in that Potter thing, the character is half fairy half nuts.
Hm. Half. Gun half. Remember that Ring of the Lord. Or the other way around.
Half blood, half cement. That person is a walking concrete.