Fingers
As a large gentleman I have similarly found myself occasionally in possession of a particularly large turd that won't go down even after 2 or 3 flushes. My solution is to fold a few layers of paper together, enough to safely grasp the object in question and squeeze it to break it in halves.

And yes, the term "pinching a loaf" did occur to me the first time I did it :)
( Ratsta, Tue 1 Apr 2008, 5:04, Reply)