a fecal structure that forms in port-a-potties and out-houses from repeated defecation where feces deposits pile in a mound like formation that extends upward resembling geologic stalagmite formations formed in limestone caves extending upward from the cave floor.
Pete "Dude! Did you see the stalagshite in the backcountry out-house?!"
Nick "Oh my gosh, dude! The stalagshite was only inches away from touching my junk!"