A polyamourous ship. Essentially, shipping a character or famous person as being in multiple relationships with different people at the same time, with all parties consenting.
She insepships WilliamxSebastian/SebastianxCiel/WilliamxRonald.
An unresolved trauma or problem or state that is locked within you. It is locked either by your conscious or subconscious choice, or by someone's actions knowingly or unknowingly. Source could also be from a different dimension/time/space.