A person, who by virtual of their physical size or dietary habits, produces bowel movements that dominate the fecosystem.
Ben froze in his tracks and backed slowly away from the stall, breathing only through his mouth. From the carnage within, it was clear he had blundered into the lair of an apex defecator
The most common spelling of the word "definitely" in internet forums, comment pages, and chat rooms. If you pay attention, you will find that "definitely" is actually the second or third most common spelling. Alternatives include "definatly", "definetly", or best of all "defiantly".