this word has two definitions:
1) to denote some one whom is far beyond the relms of uglyness and combine it with the word fucking with out the use of profanity in a public place fucking +
ugly = fugly
2) can also be assosiated with the Lindsay Lohan film 'Mean Girls', where by two insults are combined to save the time of the one throwing them. therefor
Fat +
Ugly = Fugly