4chan's /tv/ has been completely inundated with posts about "buck breaking" the last few days but it's been popping up for over a month now.
Popularized by the controversial figure Tariq Nasheed and his film "Buck Breaking" the term comes from the false idea that white slaveowners ritualistically had anal sex with their male slaves in order to degrade and humiliate them into submission.
This reddit post on r/AskHistorians details how this concept has no basis in truth: https://www.reddit.com/r/AskHistorians/comments/4vicrb/buck_breaking_of_slaves/
Nevertheless 4chan has taken the idea and ran with it. Producing exactly the kind of memes, OC, etc. you'd expect from them.