What is this I'm hearing about EXO having finally come up with a fan name?!

I think someone said it was Exocytosises or something. What the heck does that even mean...? It looks like it belongs in a science book or like its some kind of disease or something! I know for a fact that I won't be able to spell or pronounce that if someone asks me to...>.>

I just don't know... Does anyone know if this is legit or if someone just made it up?