A black (African or African-American) person.
An agitator.
Any dark-skinned person: originally specifically an Indian, but later also anybody of North African, Mediterranean, or Middle Eastern ancestry.
A bug, an insect.
A person of Southern European, Mediterranean, Middle Eastern, or Southeastern European ancestry.
A pollywog, or sailor who has never crossed the Equator.
A minor illness caused by bacteria, virus, intestinal parasite, etc.
A person who is not a Scientologist.