Definition of red-flagging in English:

red-flagging

noun

  • The action of signalling with, flying, or marking something with a red flag; specifically the action of identifying someone or something as a cause for concern or as warranting special attention.

Origin

Late 19th century; earliest use found in Boston Advertiser. Originally from red flag + -ing. In later use also partly from red-flag + -ing.

Pronunciation

red-flagging

/rɛdˈflaɡɪŋ/