exfacebook friend Share definition Flag Someone with whom you used to be facebook friends and are no longer. Also known as xfbf. Joseph was facebook friends with Bob. Joseph defriended Bob, and now they are exfacebook friends. exfacebook friend by trailmixtaco February 17, 2010 0 0 Get merch Get the exfacebook friend mug. Buy Now — $32.95 See more merch
