posy pouch Share definition Flag a posy pouch is a term used for the female genitalia; pussy; cunt; vagina Your girlfriend has the tigthest posy pouch. Well she did before i was done with her.. posy pouch by ostertoaster emaus March 1, 2011 0 0 Get merch Get the posy pouch mug. Buy Now — $32.95 See more merch