There is no definition for 'fangoriously' in any known work save the prestigious literary achievement of Strong Bad, "Everyone is different". This phenomenon is called hapax legomenon, when a word only appears once-ever. We can deduce from context, however, that fangoriously has something to do with the manner in which gelatinous monsters digest their food.
"Some people are being fangoriously eaten by a gelatinous monster. Hillary's legs are being digested."
Fantastic & Delicious put together. Said like Fan-Tay-Shious. Used when something is delicious & fantastic or use with sarcasm to say something disgusting is delicious or in response to something you didn't need to know.