Rusty Catsup Bottle Share definition Flag The sexual act of a woman defecating on a penis before vaginal intercourse while being on her period. She lovingling performed a rusty catsup bottle with her boyfriend last night. Rusty Catsup Bottle by Mahoney69 June 16, 2014 0 0 Get merch Get the Rusty Catsup Bottle mug. Buy Now — $32.95 See more merch