whats the board called thats a bit shorter and fatter than a surfing board and u have to lay down on it..not stand up.

boogie board

A bodyboard?

Belly board is what we called them.
The one pulled behind a boat that you kneel on was called a knee board.

Belly boards were not fatter they were in fact thinner and were given the name of potatoe chips they were so thin So l am guessing you mean the morey boogie board whish is similar in thickness but much shorter or like another said the knee board and riders would lay on them to paddle them but ride them on their knees.

boogie boards or body boards. how ever you like to say it. different people say it defferent ways

It is a body board. Since 1971, the term Boogie board, coined by surfer, musician, inventor Tom Morey has been used generically for all foam body boards.http://en.wikipedia.org/wiki/Bodyboard

boogie board