Gay friend: generally refers to the relationship between gay men, gay = GAY, "gay" is the homophony of the first letter "G" of "Gay". Developed from homosexuality and homosexuality, that is, mutual homosexuality; this word originally refers to gay men, but now its meaning has been extended. It not only refers to homosexuality, but is also often used to refer to better friends.

Gay is commonly used on the Internet to refer to friends or strangers. In a broad sense, it can be used to refer to good brothers, buddies, best friends, comrades, teammates in competitive games, or netizens, etc. It can be ambiguous or pulling. The meaning of close relationship.

The ACG community usually refers to gay friends as friends who meet online without knowing each other's true identity, play games together, watch anime and complain together, usually through Tieba, QQ or Acfun, Bilibili's comments. The sexual orientation of gay people in the ACG world is mostly heterosexual.