A complete moron, retard. Referenced by South Park in the episode "Make Love, Not Warcraft."
Typically used to reference people like the guy from the other entry randomly downplaying Republicans in a completely inappropriate setting - they think it's cute, but really, it's just rtarded.
All republicans, because people that don't accept facts, evidence, or reality, rather only what they want to believe in their little minds, are Retarded.
First referenced in media (South Park) I have adopted this word to mean both 'Republican' and 'Retard'. Rtard. For those of you democrats, or liberal whatever you are, rtard is the enemy!