Fugly, which is clearly defined in the other definitions, is only the beginning of a group of words which can be used to describe things. Works with any number of words. Fugly, fretarded, etc. The point is, you can make them up, as long as the word works with an f in front of it.
"Dude, her ass is like no."
"Yeah, she's so fugly"
"Well, yeah, and she's fretarded."