откуда дровишки?
предложение давайте

https://www.usingenglish.com/forum/threads/268415-an-act-of-extreme-bloodism

In the Indigenous community the form that it often takes may include attacks on someone's right to their heritage - this is sometimes referred to as "bloodism" or arguments over degree of Indigeneity.

в этом значении - чистокровность?