What does Red Flag mean?
A red flag is a warning sign that something or someone is a bad idea.
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Slang.
Where it comes from
Long-standing English idiom from actual signal flags, revived as internet shorthand around 2021 through a red-flag-emoji format on Twitter where people posted a phrase followed by a row of 🚩.
How it is actually used
The emoji does most of the work — a quoted phrase plus flags is a complete post. Applied to dating, workplaces, landlords, brands and software. The counterparts came later and matter: a green flag is a positive sign, and a beige flag is a quirk that is neither good nor bad, just odd.
Examples
- "'I don’t really read' 🚩🚩🚩"
- "unlimited PTO is sometimes a red flag"
- "that is a red flag, not a personality"
Can a brand use it? Depends on context
Fine for light content about your own category. Pointing red flags at a named competitor is a public accusation, and it invites the audience to reply with yours.
Related terms
Frequently Asked Questions
What does red flag mean?
A warning sign — a behaviour or detail suggesting something is likely to go badly.
What is a green flag?
The opposite: a sign that someone or something is healthy and worth pursuing.
What is a beige flag?
A trait that is neither a warning nor a plus — just distinctive or slightly odd. It is usually affectionate.
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