(v.) To dominate an opponent so effectively that the opponent is convinced you knew their exact strategy.
Named for the NES football game Tecmo Bowl, in which the defense had to select from one of 8 possible offensive plays to defend against. If they guessed the one the offense actually ran, they would shed every block, run at max speed, and almost instantly gang tackle the quarterback or running back.
Man, did you see the Tampa Bay Buccaneers tecmobowl the Raiders in that Super Bowl? The Bucs coach was the Raiders coach the previous year, so he literally knew what plays they were going to run! It was ridiculous.