Converting to a new religion and ending up more stupid than before.
His constant preaching is a sign of reintardation,
When somebody is reincarnated and returns as someone who is mentally challenged or retarded.
There was a boy who came back as a retard after being a famous celebrity in his previous life. Such beliefs stem the Buddhists who believe in Reincarnation, well reintardation is when someone comes back as a mentally retarded person.
Coming back to life as a hillbilly.
Did you here Spud was shot while hunting? Mary Jane And Billy Bob just had a baby, I think it is Spud Reintardated!
It means coming back to life as a RETARD, not as a hillbilly.
The person who posted the previous definition was thinking of reintarnation
Damn, it was quite sad that Mark's ubergenious rocket-scientist son had just died in an explosion while working on the latest space shuttle 9 months ago. However, my neighbors next door just had a kid that looks like Mark's son when he was baby, though I heard the kid was diagnosed with Fragile X
syndrome! It looks like Mark's son has reintardated(reintardation)! Whoop-dee-doo.
Mark H. Proud Urban Dictionary Slang Author since February 2004.