Sentence:  “How much do I want to bet the young man will be a straightlaced <WSD>knurd</WSD>?” Isabel chimed as she thought about the prospective house guest she'll be waiting on this summer. She used the derogatory term “<WSD>knurd</WSD>” she'd learned back in England from Lady Chatterly's friends who attended the school of Eton. It was “drunk” spelled backward to refer to someone who was more interested in his studies and grades than partying and enjoying alcohol after classes. 
Meaning of the word marked with <WSD> tags:  (rare) (nerd); especially used to refer to one of several (folk etymologies) of the word.