What does it mean to hav e a rotten fart like smelly discharge?

Sulfur?: Sometimes they smell like rotten eggs- because of sulfur- sulfur foods to avoid might include the yolk of the egg, cauliflower, broccoli and cabbage. If it happens often- there is an enzyme CBS that might be playing a role in the production of sulfur. Try to avoid sulfur foods and see if the problem improves, If not- consult with your doctor.