Often reffered to as the opposite of deadeye. Therefore, if someone is a zedeye, he/she cannot shoot to save his/her/a fellow ct's life.
OMFG, that guy is such a zedeye, he was three feet from the target and still missed!
P.S: if you are called a zedeye do not attempt to join the army. It may cost you your life and every other member of your platoon's lives.