satin fatty Share definition Flag A fat person that thinks he/she is so awesome and hot and is SOOOO not! In fact, they are repulsive! That girl right there is such a satin fatty! She should not be wearing that mini skirt! ICK! satin fatty by Megan the cool one November 10, 2006 0 0 Get merch Get the satin fatty mug. Buy Now — $32.95 See more merch