The act of a non-black person, most often a white woman, altering their appearance so as to appear black and/or incorporating aspects of black culture and beauty into their appearance. The term is intended as a criticism of such actions and is based on the word "catfishing," the act of misrepresenting oneself with a false identity, typically through online correspondence. People are saying this one influencer is blackfishing, and I can see why since she's using makeup to make her skin look much darker.