Not surprised people don't remember the American version. The Slap was a 2015 adaptation that NBC was pushing like it was going to be THE next big "must watch" show. According to the marketing it was going to be Lost, Game of Thrones, Breaking Bad...The Slap (Prime)
Australian darkish comedy about a wealthy group of friends at a birthday BBQ that ends abruptly after one adult slaps another person's kid. Each episode is shown through the perspective of a different character, so it's rather pleasantly contained to a mini-series. Not read the novel it's based on, but I rather enjoyed this. Everyone's messy, full of flaws and selfish desires, all of which start unraveling once the kid gets it.
Should warn, however, that there's allegedly an American adaptation. An adaptation I am confidently willing to assume is the least good version so have no interest in watching to ethically compare the two. And cannot see the point in existing anyway, I mean like at least with foreign language entertainment there's an intended audience who just can't handle reading, or different cultures, or, dare I say it, a different melanin level to pander to. But this is Australian....they're still talking English! And mostly white! And rich! Whhhhhhhhhhhhy???
Anyway, avoid the American one cause I said so, the Australian one's right there. Just. Right. There. A single click to the left. I don't care that it has modern Spock in it!
And relatively, no one watched it. It flopped harder than some of their other epic hype/failure shows of the era did. The local affiliate here... bought outdoor advertising to push The Slap. Freaking highway billboards advertising The Slap. It was a disaster. They wound up running all 8 episodes, and the review aggregators are fairly nice to it (generally around mid 60s,) but figuratively... no one watched it.