A blue flag stands for penis loss. A wise geman person ones said that hoisting a purely blue flag, or at least a blue flag without any symbol on it, indicates that the hoisting person has lost his phallus.
Person A: "Look there, captain, those poor men hoist a blue flag"
Person B: " These poor souls...."
by YourWiseAdvice April 17, 2022
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A crips bandana, flag or otherwise used bandana.
Don't want to wear my blue flag in the hood, for fear that a blood might shoot me while suspecting me to be a crip.
by Wutwutwutwutla July 19, 2006
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Generally a blue bandana, most commonly used by Los Angeles street gang known as the Crips.
"You see the blue flag in his left pocket? That's a Crip."
by VQC BK December 18, 2009
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The Bonnie Blue Flag was a flag used by Confederate soldiers as an informal military flag, and is the subject of a famous marching tune, "The Bonnie Blue Flag"
Hurrah! Hurrah! For Southern rights hurrah! Hurrah for the Bonnie Blue Flag that bears a single star!

Robert was very proud of himself when he was designated bearer of the Bonnie Blue Flag
by Matisyahu May 23, 2006
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F1 Flags waved for Nicholas Latifi, Lance Stroll, or previously, Nikita Mazepin.

Blue Flags tell a driver to let cars through that are a lap ahead.
Nikita Mazepin is Blue-Flag Sexual. He is attracted to blue flags.
by 33samtrbr April 13, 2022
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1. A Blue bandana, a standpoint marking for the street gang called "Crisps" in los angeles

2. A moment raised whenever there are usual signs to show that the guy/girl are going to be eventually cucked; rejected for someone else for pretty obvious reasons
1. you better watch out for them, he's got a blue flag; he's part of a street gang.

2. it is usualy a blue flag in anime where one of the main love interests for the main character in the anime is a childhood friend, their going to be rejected for the suddenly new person, or which ever (girl/guy) is bigger on the poster.
by WhiteEden January 4, 2019
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