the science of everything related to the jackieshauna ship in the tv show yellowjackets. it is the deepest and most complexe doomed lesbian ship ever written that needs a certain knowledge to fully comprehend it.
when a scheme similar to this doomed yuri ship is repeated somewhere else, it is jackieshaunaism, becoming a concept in itself
"needy and jennifer in jennifer’s body are so jackieshauna coded, jackieshaunaism is everywhere!"
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).