a)conceptual Barbie doll that would teach kids about mental retardation and act as balance in the world of the hegemony of artificially perfect beauty. See Ms. Wheelchair America, acrotomophiliamidget pornbarbie.
b)a blonde, Barbie-like female with shortcomings in the realm of intellect. See blonderetard.
Shaneequa: "Mommy says I'm special. Kids call me a retard."
Jessica: "Oh Em Gee!"
Stan: "Shut up, Retarbie!"