When a girl is naturally ugly/unattractive, but acquires all the "playing cards" of being attractive in today's world, therefore passing for "hot." Playing cards include, but are not limited to: tight/hugging designer jeans, trendy hairstyle, trendy clothes, hair highlights, etc. Many many girls you see out and about are very ugly-hot.
"Damn, did you see that girl? She was hot!"
"No she wasn't bro, take a good look, her face isn't pretty. She's ugly hot"
"Whatever, she's hot enough to hit it"