gay Blatino refers to a black / latino mix.
Blatino is a term that refers to a person or thing that is a mix of black and latino. In porn it often refers to a site that either features both black and latino men or features black and latino men having sex together. Blatino porn is often associated with thug porn which features tough "street" guys. Blatino is usually used in gay porn.
Black and latino men are very popular in porn for a variety of reasons, among them that both black men and latinos often have uncut cocks. There are a number of websites and some DVDs that specialize in either black/latin gay action or solo black and latin men in the same collection.