Something two or more annoying people make up so they can exclude others.
Person: Hi. Did you take that test? I think I got that one about elephants totally wrong!
Group of annoying people: PURPLE ELEPHANT!!! *burst out laughing*
Group: Its an INSIDE JOKE. We can't tell you what it means!
Person: I don't care what it means.
Group: GOOD CUZ WE'RE NOT TELLING YOU!
Person: Umm okay...
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