General information EditSeptiplier is Jacksepticeye and Markiplier combined. It is the ship name for Jack and Mark. Fans started this and have made amazing (and sometimes disturbing) fan-art, fan-fiction and some videos. It is one of the best YouTube ships ever as well as one of the most known ones!
The reason that Mark and Jack are mainly shipped with each other is because they are so close, maybe closer with each other than other youtubers. Also, them teasing their fans and joking around about loving each other has probably played a huge part in why this is such a popular ship.
Even though the two at the time this page is written, have their own girlfriends and are in a relationship. People still enjoy this ship a lot. (Respectable privacy and ze choices people~)