YGSB Share definition Flag stands for "Your Grandma Shits Burritos"...a notorious paintball crew that is into the fun thinks in life...like drinking, smoking and fucking things up "Yo, those YGSB dudes are hella partying it up" YGSB by Jamesus December 30, 2006 0 0 Get merch Get the YGSB mug. Buy Now — $32.95 See more merch