Dennis

a Dennis is what it's called when you think youre finished with no. 2 or no. 3, get up, and realize, "ooh, nope. Not done yet."

i.e. - "I had to take a rough number 2, thought I was done pooping, and realized it was a Dennis, so I had to sit back on the toilet."

i.e. - "I had to take a rough number 2, thought I was done pooping, and realized it was a Dennis, so I had to sit back on the toilet."