Nut rag Share definition Flag Something used to catch semen after you have ejaculated (washcloth; tissue; toilet paper; old sock; dirty underwear; etc). I couldn't find my nut rag under my bed so I had to walk to the bathroom with jizz all over myself. Nut rag by Cappy1 June 8, 2004 0 0 Get merch Get the Nut rag mug. Buy Now — $32.95 See more merch