Gen Z Slang

What Does "Red Flag 🚩" Mean?

Quick Definition
A warning sign that something or someone may be problematic, toxic, or dangerous.
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What "Red Flag 🚩" Really Means

A "red flag" is a warning sign in a relationship, situation, or person's behavior that suggests future problems. On social media, the red flag emoji 🚩 became a viral trend in 2021 where people would share their personal red flags — both serious and humorous. Serious red flags include controlling behavior or dishonesty. Humorous red flags include things like "doesn't like dogs" or "puts ketchup on steak."

Origin & History

Common English expression; went viral as emoji trend on Twitter 2021.

Tone & Context

This slang is generally considered negative in tone. Very widely understood. Used both seriously and humorously.

Example Sentences

  • "He said he doesn't tip — massive red flag 🚩."
  • "Red flag: she checks your phone every time you get a notification."
  • "Not liking any music is a huge red flag."
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Related Slang

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Explore More Gen Z Slang

Browse our full Gen Z Slang dictionary for more terms, or check the complete slang glossary.