Some Shippers are diehard. They'll go through everything, Fire, Ice, Lightning, nuclear explosions, you name it, but they're still sticking by their One True Pairing no matter what. Then there are the other types, who, when something unexpected is revealed, drop a Ship faster than a hot potato. Maybe it's because a character had a deep dark secret that severely makes people question their ability to even be in a relationship, maybe they're really siblings, or maybe there's some sort of other aspect to their relationship that suddenly Squicks people. When that happens and it suddenly seems like the former Shippers have dropped off the face of the Earth, they have Abandoned Ship.