backtitties Share definition Flag this occurs when a woman is so fat she has titty like fat deposits on her back "Did you see may?" "Ya, she has backtitties going on." "Gross." backtitties by Thefartmasster69xxx#promlgswag November 9, 2012 0 0 Get merch Get the backtitties mug. Buy Now — $32.95 See more merch