(spayse-sheep-boat) n.
A spaceship boat is a type of water craft originaly created for the movie 2012 that came out in 2009.
This type of water craft is typically associated with redneck rage, as many of the southern persuation dislike advanced technology to a high degree. they express their dislike quite openly.
they are large Submarine type boats that can be seen as a spaceship like craft. Otherwise
a redneck might say
(ex. "THOSE PEOPLE AND THEIR GOD DAMN SPACESHIP BOAT!")