A moment/ subject of conversation that isn't worth talking about. A little thing that normally people wouldn't bother to bring up.
X: Let's *cough, cough* shake on it.
Y: I'm not gonna shake hands with YOU, you just coughed in your hands!
Y: Now that's a Seinfeld episode.
X: Are you kidding me?
Y: Why what happened?
X: My waiter spilled my drink and didn't even offer to clean it up!
Y: I'll just ask him to pick it up.
X:No don't do that, he knows i saw him do it.
Y: Your making this such a Seinfeld episode.