👉 The term "big joke" is quite a bit more than just a straightforward expression of humor. It refers to a kind of joke that involves a seemingly silly or nonsensical statement that suddenly becomes very serious in the end.
Imagine this: You're on your lunch break at work, and you decide to watch a bizarre TV show where everyone is playing a prank on each other. One person tells another, "Hey, I know you all really want to be a clown but it's actually a big joke!" The person who hears that doesn't believe it for a second. But then, the next day, they tell their boss about this strange joke and find out that everyone is still having fun with it. They're shocked! "Big joke" has completely turned people off from them! And here’s an example sentence: "Hey, you know what I'm thinking? Big joke time!"