Urban Dictionary: Blue flag

2.	Blue flag
	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." buy blue flag mugs & shirts crip bandana flag gang blue street gang by VQC BK Dec 18, 2009 add a video
1.	blue flag
	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. buy blue flag mugs & shirts blue flag blue flag crips bloods gang bandana by Wutwutwutwutla Jul 19, 2006 add a video