The term "negras" refers to Black women, while "culonas" is a colloquial Spanish term used to describe individuals with prominent buttocks. "En 4 patas" refers to a quadrupedal position.
That being said, I couldn't find any specific information on "negras culonas en 4 patas fot." It's possible that this is a term or phrase that may not be widely recognized or may be a misspelling. negras culonas en 4 patas fot