A simpler way to say nigger or nigga, sort of originating from TFE and "izzle" talk, such as nizzle.
Not really derogatory, just a playful and mentally ill alternative to nigga.
Juvenile version of New England adjective "Pissah" when your mother wouldn't let you say bad words. Means "great" or "awesome". Derived from "pissah" and "whiz" in use by children.