Fourth Hole

Fourth Hole is a slang term that emerged in the wake of discussions about a confusing September 2023 X / Twitter post made by user @t_sadiity in which they talked about "cheating on a girl that does all 4 holes." Internet users confused by what constitutes a "fourth hole" in a sexual context went on to make memes and jokes about what it could be as the term spread online over the following days.