Top Definition
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!
de Fitbot 07 Iulie 2008
6 Words related to metabolism surprise

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