You little pooper!
I was lying in bed with Goldilocks having a tickle/hug time. He was telling jokes and teasing me, I finally said "Quit it you pooper". Goldilocks pulled far away from me very dignified and said "I have NEVER pooped in my life" I replied "yes you have, I cleaned your poop all the time, when you were a baby." His face turned even more shocked and he turned his nose very far up and said "eeewwwwww yuck!"