wygbsm Share definition Flag stands for "Why you gotta be so mean?" which is part of the chorus in the song "Mean" by Taylor Swift. -"I hate your skirt."-"wygbsm?" wygbsm by mynameisoscar October 19, 2011 0 0 Get merch Get the wygbsm mug. Buy Now — $32.95 See more merch
