It started with a fart joke.
And yet, Swiss Army Man is a lot more than a simple fart joke, and it’s not just about a highly functioning zombie that doubles as a Swiss Army knife and has some unusual skills. But if I were to summarize what the movie is about, those are the exact things I would mention first. Fart jokes and a formerly dead person whose farts can make him jet ski and whose erect penis doubles as a compass.