An inside joke is something used to exclude others out of conversations and to strengthen one's own
friendship, which is why
humanity is extremely selfish. However, others can be included, but they feel
awkward.
"I'm going to eat curry with some more curry and
pizza when I fly on this airlines called Fly Curry Curry
Pizza 2.0. The airlines is a group of people meant to manipulate several people for one's gain and basically serves various kinds of food, including curry and
pizza. It's imaginary, but you know where this inside joke comes from since you are my
friend." -friend #1
"Hahahahahahahaha! The airline also gives free ipads in-flight and donates to various countries and is very cheap!" -friend #2
"I'm gonna walk the dog now. Then I'm going to take over the world because of modern day politics." -random person