Cablepool

Cablepool is the slash ship between Cable and Deadpool from the Deadpool fandom.

Deadpool
During the Ferris Beuler syle end credits scene, Wade reveals that Cable will be in the second film.

Deadpool 2
While Wade is in the "Icebox", a mutant prison, Cable breaks in and attempts to kill Russell Collins, the mutant Wade was sent there with. The two begin to fight, but Wade forces the two out of the prison. Wade decides to help Russell while he's being transported and starts a team called X-Force. During the transport Cable attempts to kill Russell again. Cable and Wade fight again, but both are unsuccessful to get to Russell before he releases the Juggernaut. Cable finds Wade back at Blind Al's place and explains why he's after Russell. Russell eventually grows up and kills Cable's family, so he's going to kill Russell before he gets that chance, but he needs Wade's help. Wade convinces Cable to let him try and talk Russell down, and Cable agree's. The two, along with Domino, head to the orphanage where Russell was before the Icebox. The two fight the guards and get to Russell, Wade tries to convince him not to kill anyone but it doesn't work. Russell is about to use his powers, as Wade puts on an anti-mutant power collar to make sure its him, but Cable runs to get a gun only a few feet away. Just as he fires Wade jumps in front of the bullet in order to save Russell and dies. Cable uses his time device in order to save Wade. Since it was his only jump left, he can't go back to his family in the future.

Fanon
Cablepool was popular during the release of the comics series, Cable & Deadpool, but is more rare in modern fandom, given the popularity of Spideypool as well as Marvel marketing that relationship more. Although the ship has become more relevant after the release of Deadpool 2.

On AO3 it is the most written ship for Cable and the second most written ship for Deadpool. It is the third most written ship in the Deadpool tag and the most written in the Cable & Deadpool tag.

Fandom
AO3

Wikipedia
 * Cable & Deadpool