Gacha (or Gachapon) is a monetisation technique used in many successful Japanese free-to-play games. Originally a term used for Japanese Toy machines, this is used to describe games that pull a selection of data, people, heroes, etc. from a large pool at random.

Fire Emblem Heroes is the latest and popular example of a Gacha game as such.

An exclamation made when your friends or family are teasing you to a point where you can't handle it anymore and a hissy fit is in order.

Derived from a YouTube user's famed outburst following Britney's lackluster performance at the 2007 VMA's.

An anime dress up game, targetted for all ages, but a bunch of horny kids decided to ruin the game's reputation.

1) a type of gambling machine, digital or not, originating in Japan.
2) anything having to do with Gacha Life, the Gacha Community, etc.

Short for Gachapon, Gacha a Japanese toy machine that is rigged with incredibly shitty odds. Later monetized by "free-to-play" mobile game developers in an attempt make a quick buck. Gacha games are usually identified by their drop rates of anything decent usually being about 1-5%

This thing

A game originally made by Luni. The game is a studio where you can dress up your characters and make movies, music videos, or memes. There is a whole community centered on this called the Gacha Community. There are many apps that are part of this like gacha studio, gacha life, and gacha club. Gacha club is so far the newest and the one that I would recommend for advanced gachatubers. There has been some gacha heat videos with explixit and disgusting videos that you would need a holy grail to cure, so if you come across these videos report them immediately.