Glad to see that your instance filter is working. Everyone should be free to curate the content they see.
For the benefit of others, checking your comment history, it is hilarious to me that you've never posted in your home instance even once and have the audacity to call us brigadiers.
It was a shock reaction image that became popular on r/cth and kind of became a mascot for the sub & then later for chapo.chat/hexbear.
Honestly, we all got so used to it that it became a nothingburger internally, just a way to tell someone to eff off. I was surprised to see it actually affecting people post-federation, but that's also attributable to the emoji bug.
CW: Article on the source of Pig Poop Balls