I have had 2 bowel movements today and both times i have had coffee ground looking stuff in them what could it be?

Bleeding: Coffee ground stools is the classic description of blood in the stool emanating from the upper gastrointestinal track (stomach and small intestines). It is a sign of bleeding from peptic ulceration of the stomach or duodenum (first portion of the small intestine) or esophageal varices). You should consult your physician as soon as possible or visit the er.