Mel is a study in contradictions. While his stage persona involves wearing a grass skirt, a shark-tooth necklace, and communicating only via slide whistle, his "off-camera" personality is quite different:
He represents the "Simpsons Reality" theory. While most background characters in the show are just regular townspeople, this guy exists in a perpetual state of "cool." He talks in rhymes, dresses in period clothing, and seems to exist in his own movie separate from Springfield. The bone in the hair is the ultimate commitment to the bit—it makes no logical sense, yet he wears it with absolute confidence. guy with bone in hair simpsons
You're referring to the iconic Simpsons character, Sideshow Bob! Mel is a study in contradictions