Procrapinate
–verb; to defer the action of crapping; delay: to procrastinate until your sphincter can no longer hold back the wave of poo attempting to break free.

Related Forms:
Procrapinating, Procrapinated, Procrapination, Procrapinator.
Exmaple 1: Today, I was so lazy that I managed to procrapinate seven hours before finally giving in to my sphincter.

Example 2: I'm a chronic procrapinator.