Backstreet Flexin' Share definition Flag To flaunt or show off without having knowledge or intent of doin so.See also Flexin Bob: Damn! Did you see Sarah today? She was looking good!Tom: Yeah man, She's Backstreet Flexin'!! Backstreet Flexin' by MrBlckStallion November 25, 2013 0 0 Get merch Get the Backstreet Flexin' mug. Buy Now — $32.95 See more merch
