What is the origin of beanis?

I know that beanis became popular here because of the badposting comm, but did the badposting community invent beanis? There are a few comments from a long time ago mentioning beanis, but beanis posting seems to have started in badposting, and what I am more curious about is the emoji

Was the emoji created by hexbear or somewhere else? Because I'm pretty sure I saw beanis out in the wild, on instagram, not too long ago. If I remember correctly, it was a screenshot of a twitter post that had something to do with beans and the avatar was literally :beanis: and I can't figure out where this originated from.