Bffcuz Share definition Flag Being best friends with your cousin's best friend. Started with youtube star davedays' best friend iamchrisc and davedays' cousin jagglybaggly. Family member: Who is that with cousin dave over there? Me: He's my bffcuz, chris! Bffcuz by jagglybaggly July 7, 2009 0 0 Get merch Get the Bffcuz mug. Buy Now — $32.95 See more merch
