swampy clam Share definition Flag A musty-smelling, nasty vagina. "Damn, Stacy's mom had such a swampy clam" "Yo this bitch had a swampy clam" swampy clam by Clitman April 3, 2014 0 0 Get merch Get the swampy clam mug. Buy Now — $32.95 See more merch