Jai

Jai is the het ship between Mai and Jet from the Avatar: The Last Airbender fandom

Canon
Mai and Jet never met in canon, and it's very unlikely that they have ever met each other. However despite that they are still fairly similar as they are both skilled fighters despite not having any bending and both have a rebellious streak.

Fanon
Jai has a decent amount of popularity within the ATLA fandom despite being a crack couple. Many like it because they think that Zuko is too formal for Mai, and that he doesn't understand her love of the thrill of action. They speculate that she would get that thrill if she were with Jet and joined the freedom fighters. Others speculate that she could help him get over his hatred of the Fire Nation. It is often shipped along side Zutara, as it solves the problem of Mai having a love interest. It sometimes butts head with Maiko.

Fanfiction
Jet/Mai on Ao3

Mai/Jet on Fanfiction.net

Trivia

 * While they have never met, so there is no way to know for sure, considering Jet's strong hatred towards the Fire Nation Jai could be argued to count as enemyslash.