(All of the information in this article is considered somewhat head canon. Not much is known about the Reverse Mabifica ship. It's up to the shipper to decide how one wants to view this ship or which head canon to follow.)
Reverse Mabifca is the shipping of Mabel Gleeful and Pacifica Southeast. It's the reverse ship of the popular Gravity Falls Mabifica (Mabel Pines X Pacifica Northwest).