Typically refers to a female who is cute in somewhat of a nerdy, or sophistocated type of way. Most females refered to as "nerdy cute" tend to wear glasses, or either lack the confidence and sex appeal that most attractive girls have. Many of them present that mystery that makes a man wonder how much of a freak she is behind closed doors. Many girls who are in the transitional stage from "ugly duckling" to a beautiful woman will be considered as nerdy cute. Overall, most of them appear as if they have a cute innocence about them, and most seem as if they could be beautiful if they were dressed up
Myra from Family Matters is the perfect example of a girl who is "nerdy cute".
Laney Boggs is another example of a girl who's "nerdy cute"..especially because she looked amazing when she was dressed up.
"You see that girl over on the side sittin by herself? She never talks, and she's always reading at lunch time. She's not fine, but she's nerdy cute"