eachself
A pronoun. For example used to describe the seating arrangement where you have accidentally booked yourself twice onto the same budget airline flight.
A: Shit, Ryanair failed to send me a confirmation email so when I booked the same flight an hour later it turned out I was booked twice on the same flight.
B: Well, it could be nice to sit next to eachself.
B: Well, it could be nice to sit next to eachself.