nerdy          
adjective  informal usually disapproving uk/ˈnɜː.di/ us/ˈnɝː.di/
 (尤指男子)愚蠢的,呆子似的
not attractive and awkward or socially embarrassing
  He's nice, but kind of nerdy. 他人挺好的,就是有点书呆子气。 
 These glasses make me look/feel nerdy. 这副眼镜让我显得/感觉很有点书呆子气。 
  电脑高手
extremely interested in one subject, especially computers, and knowing a lot of facts about it
  There is a perception of IT people being nerdy geeks working in isolated backroom office jobs. 人们认为IT人员是在隔绝无窗的密室中工作的电脑高手。 
 The smart, nerdy kids weren't invited to eat lunch with the cool kids. 那些功课好、书呆子气的孩子没有被邀请和酷孩子们一起吃午饭。 
 See: nerd
 - More examples
 - He looks like a slightly nerdy bike messenger.
 - People think of cyber attackers as nerdy teenagers.
 - He's a young-looking nerdy guy who wears terrible clothes.