The inability to differentiate between inverse Tetris pieces (such as "Z" and "S" pieces) due to increased gravity and/or poor reflexes caused by sleep deprivation (from playing too much Tetris) or lack of skill (from not playing enough Tetris).
I almost beat my high score last night, but the tetrislexia got to me. I confused the "L" pieces and totally screwed myself!
by Kahlil Robinson December 3, 2006