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, acrotomophilia midget porn barbie.
b)a blonde, Barbie-like female with shortcomings in the realm of intellect. See blonde retard.
Shaneequa: "Mommy says I'm special. Kids call me a retard."
Jessica: "Oh Em Gee!"
Stan: "Shut up, Retarbie!"