Sentence:  Bud was <WSD>not a pretty sight</WSD>. Four days and nights of trying to see how much whisky he could drink, and how long he could play poker without going to sleep or going broke, had left their mark on his face. 
Meaning of the word marked with <WSD> tags:  Something visually unappealing, ranging from mildly unattractive to utterly disgusting in appearance.