A fluid definition that can mean to be proper and polite even in an argument and suddenly sprouting insults.
Person 1: And that is why i dislike that characters development
Person 2: Look at us having a heated debate. We’re growing as people
Person 1: yeah but u gay boi Person 2: wtf happened to being civil
Person 1: This is the new meaning of civil. We changed the definition
an adjective of sophisticated refinement meaning very good, excellent, fashionable, hip, or cool. "Civil" isn't criticized like words such as "tight" or "hella".