A junkie term used to describe when the blood flings out into the syringe from pulling the plunger. This is a way of knowing you hit a vein. The reason it's called 'the flag' is because when the blood comes out it has a flag-waving appearance.
Sally knew she hit a vein when she saw the flag, she carefully pushed on the plunger of the syringe and waited anxiously for the rush.
by tonitewedineinhell August 1, 2008
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Get the flag mug.I botted with ICHC on Club Live and now I'm flagged and won't get my mother fucking prize! FML.
Am I flagged if I got an error while using CBX?
Yes you're fucking flagged.
Am I flagged if I got an error while using CBX?
Yes you're fucking flagged.
by A CL Botter May 2, 2009
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