What exactly does “red flag” mean?
A red flag is either a literal warning of some danger, like the signal flag used by a sinking ship, or a figurative warning, like the red flag a candidate’s angry outburst sends to the voters about his temperament. Red Flag) Emoji Meaning and Usage Download Article. The red flag emoji signifies a “deal-breaker” in a romantic partner. People use the red flag emoji on social media and in texts to highlight a particular behavior or trait that they find off-putting or disturbing.