A degree earned after a Master's Degree. F.D.'s can only be earned through multiple lessons on the internet. Though this degree is often used to insult one's ability in a certain subject.
F.D. does not stand for anything besides F Degree.
Dr. Smurf has a F.D. in SHIT. Thus, he must know a lot on the subject of SHIT.
Not what you are probably thinking...
F'd is when there is so much pressure you just flunk everything and get a big, fat F!
if you live in Davis, CA you would understand the pressure