A hot, rich, embarrassing Goth from the anime Tokyo Revengers who mistakes non-dead/injured people as dead cuz of Goth, brotherly sentiment; for he has a precious Goth brother named Haitani Rindou.
Person 1: Haitani Ran just like me fr: Needs glasses to match with his brother or he mistakes the living for the dead sometimes.
Person 2: I want Haitani Ran to ambush me then hit me with a rod stick.
Person 3: I want Haitani Ran to close my eyes as if I were supposedly passing away.
Haiya is the opposite of fuiyoh and is the MSG of words. It is used when expressing extreme disappointment, frustration, etc. The word went from only being popular in middle-aged English speaking Asian groups to being appreciated by a wide range of people because of recent viral videos on Youtube by Uncle Roger, a persona created by an Malaysian British comedian, Nigel Ng.
"Everybody should use the word haiya to expand your vocabulary, no matter if you're asian, white, black, or green." -- Uncle Roger, 2020