An infestation of ignorant ghetto behavior, which started off in America's ghettos, but spread to the suburbs where non-black people act all ignorant and call themselves and each other Nigga, which is spreading like a disease hence the term Negritis. Which was coined by Mexicans or Latinos.
Juan: Hey what up Nigga you wanna get hella faded?
Negrotism is a type of "blackness" or invisible "black matter" that radiates off of someone with a high level of Negrosity. This is often seen when someone smokes weed or a combination of other drugs (such as a Jeffrey). Negrotism may be radiated from a subject whether they are of black decent or not, as long as the Negrosity levels are high enough. Negrotism can sometime be absorbed from an outside source such as another subject radiating Negrotism. Negrotism can be more easily absorbed if the subject consumes more cornbread, grape drink, fried chicken, corn, and even mashed potatoes to an extent.
Nate smoked so much of that reallyballin' weed that he started to radiate Negrotism.