FAFO is an acronym that means Fuck around and figure out. It is a slang expression that is used both on the internet and offline to caution someone that he or she is doing something that can cause them to face repercussions. It is commonly used in social media posts, memes, or just in a conversation in order to point out risky behavior. Although it may be comic in one context, it is usually serious or warning in another context in its usage. Know more about fafo meaning slang