The most likely origin is that the term "Full house" became "Full boat" as a result of riverboat gambling, where the game was frequently played, and they were on a boat not in a house. Full boat then became shortened to just "boat". read more
A full house is called a 'boat' from the imagery created with the pair on the bottom, and the three cards on top. Imagine a 3/2/1 pyramid (3 cards on the bottom, two in the middle, one on top). Take the top off, and turn it upside down. read more
Best Answer: Because every card in your poker hand is being used. three of a kind and a pair = 5 cards used. Sometimes it is called a full boat. read more