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 06, 2006

Red-shelled koopas, as seen in Super Mario Bros., who are safety-conscious, and won't walk of ledges.
"Watch out for that koopa, up on that ledge!"
"It's okay, Alex. Safety koopas don't jump off ledges."
"It's okay, Alex. Safety koopas don't jump off ledges."
by Kahlil Robinson June 13, 2007

by Kahlil Robinson April 23, 2008
