Let's look up your spelling on publicly available sources:
poosie
Poosie(Poo-see) comes from the word pussy, vagina, twat, **MASK**, cooter, ect ect. The differnce is that Poosie is a really nice pussy.
I roxxed her poosie.
https://www.urbandictionary.com/define.php?term=poosie
So, you didn't misspell anything, you just think Watson is really nice, in a vagina sort of way. I stand corrected!