two of the same word combined, a rare term used for red headed individuals in a small community, or an absolute moron, maybe even both depending on the context
person 1: look at that red red!
person 2: do you mean I'm stupid or soulless?
Person 1: both
A red headed person who is simply an idiot.
“You heard of that new show?”
“Yeah it was cool, but the Red Red ruined it.”
“Yeah.”