From a compounding of "nigger" and "honky". Used to describe a person fitting the first description acting as a person fitting the second.
"He's got qualifications, a job, property & he plans for his kids..Is he going nonky on us or what?", or
"Who's the new nonky on reception? He speaks betterenglish than I do!"
A black man or woman, walks around trying to impersonate a white Caucasian individual. By attempting to roller skate, race cars, play golf or swim. Etc
While our lifespan is the number of years we will live, our healthspan is the number of healthy years we will have and our sexspan is is the number of years we will continue to be healthy enough to continue having an active sex life.