Most likely a Ubangi tribesman.
"It has been tradition in many cultures to undergo some sort of body modification, some more severe and frightfully horrid than others. Each procedure has its own purpose and symbolic meaning. For example, in the Ubangi tribes of Africa it is common for young males to insert plates into their mouths, thus stretching out the lips. As the male grows older, the plates in his mouth would increase in size until he uses plates almost a foot in diameter. There is no distinct reason why the tribes do this but it is popular belief that it is a coming of age ritual.
How do you order a drink in Africa?
Ubangi on the bar.
Ba da boom.