dump swamp Share definition Flag dump(ing, ed) swamp- to have the shits. can be used in past and presen or future. Oh man, I had way to many onion rings last night. I've been dumping swamp all day. dump swamp by butchmanum August 16, 2005 0 0 Get merch Get the dump swamp mug. Buy Now — $32.95 See more merch