1. To attempt to verbally exert wisdom or intellectualism, but to instead allude to ones ignorance.
2. To expose ones lack of cognizance, especially in front of large audiences.
3. To blunder while relaying information meant to have dramatic impact, thus disarming its ability to do so.
"Fool me once.. shame on... shame on you... *confused look* ...You fool me, you cant get fooled again" -George W. Bush
"Wow, you really georgebushed that one!"