Defined by Jerry Seinfeld, in the episode "The Stranded": "All plans between men are tentative. If one man should suddenly have an opportunity to pursue a woman, it's like these two guys never met each other ever in life."
Elaine: Oh great, oh, this is great. How could you let him take the car?
Jerry: There's nothing I could do, it's part of Code.
Monologue:…This is the male code. And it doesn't matter how important the arrangements are, I mean, most of the time when they scrub a space shuttle mission it's because one of the astronauts met someone on his way to the launch pad. They hold that countdown. He's leaning against the rocket talking to her, "So listen, when I get back what do you say we get together for some Tang?"