👉 Barf is a slang word that refers to something that comes out of one's mouth or nose. It is often used in a humorous context and can be a reaction to something being unpleasant, such as when someone is having trouble breathing or has vomited. For example, if you hear someone saying "I'm barfing," it means they are experiencing a stomach upset or have vomited something. This term is often used to describe an uncomfortable experience or situation.