Poosie(Poo-see) comes from the word pussy, vagina, twat, cunt, cooter, ect ect. The differnce is that Poosie is a really nice pussy.
I roxxed her poosie.
by Syntek March 18, 2005
by da ma October 3, 2003
A poosy is when you stick your dick inside a girls arsehole and get juice all over your dick and then stick it back in her pussy - voilà you've made a poosy!
by Poosymonster December 30, 2020
A combination of the words "poo" and "pussy" to form one word relating the use of the asshole as a pussy. Often, but not necessarily always, used in the case of a mtf transsexual.
by The Nagus June 21, 2011
Harry is a poosi!!
POOOOOSI
POOOOOSI
by Kdawgizzle August 30, 2006
by Sally Slade :] December 6, 2007