Green flag / Red flag definition: what "Green flag / Red flag" means and examples

Borrowed from racing and safety contexts, these terms are the primary way the younger generation audits their social and romantic lives. A "Green Flag" is a positive trait that indicates a person is kind, stable, or compatible. Conversely, a "Red Flag" is a warning sign of toxic or problematic behaviour. These are not just for dating; they are used to describe friends, teachers, or even brands. It is a system of emotional intelligence packaged into simple visual metaphors, allowing youth to quickly communicate whether someone is "safe" or "dangerous" to engage with. It helps them set boundaries and share advice with peers about who to trust and who to avoid in their social circles.

Examples:

1. "He asked if I got home safe after the cinema, which is such a massive green flag."
2. "She never lets anyone else speak in the group chat, and honestly, it is a bit of a red flag."
3. "The fact that he is still friends with all his exes is a major red flag for me."