When you go to the toilet to do a wee and you unexpectedly do a poo too.
When Stinkbot when to relieve her bladder before she went running with Fitbot she had a metabolism surprise. Fitbot was glad she didn't need to use the loo after Stinkbot had a metabolism surprise. Poowee stinky!
ayon kay Fitbot ika-07 ng Hulyo, 2008