swamp Share definition Flag (noun)Thick, rich, nasty, muddy, not-runny, semen. (verb)To ejaculate some swamp. (see above) Ricky: Dude, I just let out a swamp. James: Yo, did you get swamped on? swamp by jk196011 September 21, 2006 0 0 Get merch Get the swamp mug. Buy Now — $32.95 See more merch