Jacko
A fake name the tabloids made up so they could talk crap about Michael Jackson and make more money off his misery like he's their personal punching bag.
The tabloids called him Jacko so they could make him look like a total f***up.
Jacko is just Michael Jackson with a bad haircut and a worse reputation.
They made Jacko so they could sell more papers and hate on him at the same time.