Quoting El Barto !
Sebeus said 'poop'...Nice ship, Dude!
That happens to be the correct terminology for the highest deck at the stern of a tall ship, the term originates from the french word "la poupe" which actually means "stern" I don't know if this is connected in any way but the very similar dutch word "poep" means "a ss" which I think would make a nice reference as well as the specified deck is located at the rear of the ship :P
Anyway...eh...right....yes I said 'poop' :D