Definitions
There are 3 meanings of the phrase
Red Flag.
Red Flag - as a noun
A flag that serves as a warning signal
Example: "We didn't swim at the beach because the red flag was up"
The emblem of socialist revolution
Something that irritates or demands immediate action
Example: "Doing that is like waving a red flag in front of a bull"
Example Sentences
"Seeing him hanging out with known criminals was a red flag for me."
"Her excessive secrecy about her personal life raised a red flag among her friends."
"The company's sudden change in leadership was a red flag for investors."
"Finding drugs in his backpack was a red flag for the school administration."
"Her constant criticism and belittlement of her partner were red flags for an unhealthy relationship."
