Where in the bible is the story of a fat guy who gets stabbed in the stomach and he?s so fat the knife stays in him but no one can see it.

The story you are thinking of can be found in Judges 3:12-31. It is the story of Ehud and the Fat Man.

Tags: fat manobesitybiblestomach 
Wednesday, February 01 2012
Source: http://www.alltruebible.com/judges_03-12.shtml