A young (typically white) male from suburbia that comes from a nice middle class family type environment and upbringing that dresses and acts like as though they are "hardcore" from the streets of South Central L.A. or Harlem. Fully versed in Ebonics, they most often use the word "Yo" to begin any sentence or greeting.
Note: It is unsure if a Yo Yo knows whether or not they are fooling anyone with their act. It is assumed if they do know, they continue with the act regardless.
"I pulled up to a red light beside a bunch of Yo Yo's in their Mom's Toyota Camry blasting some Tupac; I laughed."