1) Traditional symbol of socialist resistance.

2) in an Orwellian reversal, also the song sung by Blair and his cronies at Labour Party Conference
Red Flag (song), Blair version:

We'll suck up to the ruling class
We'll fuck the workers up the ass
And just to show that we're sincere
We'll sing the Red Flag once a year.
by annoyed anarchist May 28, 2004
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Eliana: He was really nice, and really hot, but he was red flagged.
by Brown Eyed Girl May 30, 2005
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When an individual purposely leaves a used tampon to be found
Marsha used Red Flagging to warn Greg that her vagina is bleeding
by Cornelius Licorice November 11, 2020
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An indication of a bad or possibly dangerous person.
"Yo, have you seen Matthew? he's a walking, talking red flag."
by Breaddicus April 11, 2022
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A red flag is a person who was a bad personality.. like, very bad personality. Just stay away from them.
by jayson.the.avgeek May 30, 2023
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a term used to describe actions that reveal someone is a hoe, manipulative, and/or unfaithful.
Guy 1: this girls so fine and we’ve been hitting it off but she still snaps all her ex’s
Guy 2: nah bruh you gotta drop her that’s a red flag
by jameslovendaul January 13, 2023
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A girl named katie. She’s here for a good time, but not a long time. Don’t get too comfortable.
I met katie and she gave me her number. I never heard from her again, i officially was red flagged.
by gmarie16 December 17, 2022
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