Avpol

Avpol is the slash ship between Muhammad Avdol and Jean Pierre Polnareff from the JoJo's Bizarre Adventure fandom.

Canon
At first Avdol and Polnareff weren't really in a friendly relationship. They didn't agree with each other a lot. But it all changed when Avdol saved Polnareff from Hol Horse and J. Geil.

Jean thought that Avdol died, it seemed like it. That was the very first time we saw Polnareff crying so badly. He felt guilty and responsible for Muhammad's death.

In episode 21 of the 2nd season Polnareff meets Cameo's Judgement, who says that he can make Jean's three wishes come true. One of Polnareff's wishes is to bring his sister and Avdol to life. Of course, Jean was tricked. Yes, his sister and Avdol was "brought back to life", but they weren't really themselves. Just at that point the real Muhammad saves Polnareff for the second time, revealing before him that he's alive and he didn't died. The rest already knew about that, only Jean didn't. The moment he sees the real Avdol is also the second moment when Polnareff cries the most, but this time delightedly. From that moment Muhammad and Jean become really good friends.

In the last episodes of Stardust Crusaders, Avdol really dies in the DIO's mansion. After defeating Vanilla Ice, Jean sees Muhammad's and Iggy's ghosts. After that despite telling himself that he has no time to cry now, he starts crying, because of their deaths anyway.

Fanon
Avpol isn't one of the most popular ships in the whole fandom, but is the 2nd popular ship in Stardust Crusaders, after JotaKak.