A pundidiot is a TV pundit (or "talking head") - usually of the political variety - who is either breathtakingly stupid, ill-informed, or so blinded by ideology that they just sound like total idiots.
Also, it's the *correct* portmanteau for pundit + idiot.
Did you see Jane Hamsher on MSNBC? She's a total pundidiot.
n. (redundant) An idiotic pundit on television blowing up something from nothing.
1. "Boy that FOX News pundidiot sure tried to make a story out of those racial definition cupcakes."
2. That Jon Stewart is so funny. Yeah he really made pundidiots out of CNN for the Tea Party last night.