SOSD Share definition Flag A legendary Destiny clan. Stands for Sepiks on speeed dial/sucking on some dick. Created by lmaotom taken over by people that aren't coons. Yo i finally got into SOSDYo i just finished SOSDing SOSD by SOSDFRump May 30, 2018 0 0 Get merch Get the SOSD mug. Buy Now — $32.95 See more merch