A racial slur for dark skinned
people which is equivalent to calling them "monkey". It is a misspelling of "macaca", a genus of monkeys which includes the rhesus and macacque, or is a misspelling based on a mispronounciation of macaque, a species in that genus of monkey. It is often used in America to describe dark skinned
people other than those of African ancestry, such as south Indian or Pakistani, while in other parts of the world refers to all dark skinned
people.
In a southern
state US political meeting, of
people who might typically have a dixie flag in their
office, the speaker notices a dark skinned person who is not a servant or otherwised authorized to be there, and asks, "What is that makaka doing here?"