Cannibalism is when somebody eats another person. In popular culture, it means that it's something that people talk about and do in movies, books, and TV shows.
Sometimes, people make movies or stories about people who eat other people because they think it's scary or interesting. This happens a lot in horror movies.
It's important to remember that cannibalism is illegal and dangerous in real life! Eating people is not okay and can make you very sick. But in stories and movies, it's okay because it's not real.
Some characters in popular culture, like Hannibal Lecter, are famous for being cannibals. People might be interested in these characters because they're so different from normal people. But it's important to remember that these characters are fictional!
In conclusion, cannibalism in popular culture means that people talk about it and make stories and movies about it. But in real life, it's illegal and dangerous. So don't try it at home!