Someone who fits the nerd description in that the person in question is socially inept and has obscure interests, however he/she does not have the typical nerd appearance. Instead, he/she is fairly attractive and doesn't scream nerd right away.
-You see that girl over there?
-Yeah, she's hot!
-She's also the owner of the most popular Star Wars RPG online.
-Wow... talk about your astereotypical nerd!