a word derived from ski, a niggabrainski is basically like the ultimate term to call your bredrin, your nigga for example. das yo best man thats the brudda that will always slide for you; unlike you tati you a bitch
Certain Person: “Nah nigga, that’s crazy!”
Random guy: “What did you just call him?”
Friend: “He called me that word because he is a certain person dummy!”