My ultrasound revealed diffuse increased echogenicity and coarsened echotexture. what does that mean?

It's Subjective: Generally, increased echogenecity indicates fatty infiltration, and coarsened echo texture (of the liver) could indicate cirrhosis (or hepatitis; among others), however, the findings are very subjective, cannot be graded and vary from observer to observer. If you have known liver disease (or even if unknown), consult a gastroenterologist for possible liver biopsy.