cumrag Share definition Flag a rag or cloth used to wipe up excess ejaculation; a woman who enjoys being ejaculated upon; extremely easy woman; notoriously loose You know Jane the cheerleader? She's the football team's cumrag on road games. cumrag by MartinBlank March 30, 2005 0 0 Get merch Get the cumrag mug. Buy Now — $32.95 See more merch