ftbrg Share definition Flag Stands for "Fuck That Butt Real Good" originated from a goon story from SA forums. UT: Im off to see Amanda again, were going to "hang out" GS: You go man and make sure you FTBRG ftbrg by DMZ101 April 24, 2007 0 0 Get merch Get the ftbrg mug. Buy Now — $32.95 See more merch
