1 definition by Tom Gronski
A hard piece of feces that elongates out of your rectum untill it is as thin as a tootsie roll about 14-18 in. Usually occurs after digestion of starchy foods.
"John, after I had your triple cheese potatoes with the bread and butter for lunch, I hit the pasta buffet up and I really got the feeling that an arkanoid was on its way." I went to the Portable John and a 17 inch arkanoid was floating in the toilet."
by Tom Gronski March 25, 2008