I know what a Leprechaun is.... but what's a Leper-Con?
A con man with Leprosy?
A leprous Irish conservative?
It sounds like Savage is thinking: O'Reilly's Irish, I [Savage] don't like him, so I'll call him a Leprechaun. It makes no sense and misses the mark as to why O'Reilly is so objectionable.
I find Savage refreshing --up to a point. He's so topsy turvey on Bush. One week he's savaging Bush, the next he's admiring him to the sky. Take Schiavo case as an example. Because Bush [W] did not send in the Marines, that supposedly proved to Savage that Bush's efforts were all a con game. Absurd fits, yes. It is tied to his varying moods.
Result, he can't be taken too seriously when you listen to any particular show.