noun: When you forget to wear your glasses and you are walking around a public setting. You see your old flame . He/She says hello to you and you tell Him/Her to go fuck themselves. Later you realize that it was not your old flame that said hello and that he/she was talking to someone else behind you. The momentary blindness gave you the courage to say what you felt.
Guy1 walks into a bookstore
Guy1 walks out 5 minutes later
Guy1: Man i just told my ex what i actually though of her
Guy2: Did you have your glasses?
Guy2: Well that's blind ambition for ya.