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1.
The Fang Over similar to the Hang Over.

the feeling of nausea, over tiredness, red eyes and achy bones and muscles
after pulling an all nighter reading the last book of the twilight series
Katie- Hey Emma How are you
Emma- I have a total Fang Over I stayed up till 4 in the morning reading Breaking Dawn
Katie- See i told you not to.
by MrLemman August 20, 2009
 
2.
A food hangover, that horrible feeling from eating too much junk food.
oh I feel terrible from eating that pizza last night at 3am, I have a fangover.
by amykickass August 04, 2008