Michelle's Life in La-La Land

 When reading the news about Microsoft's new MP3 player -Zune, I saw the title "The grinches that stole Zune's Christmas."   I didn't understand what "grinch" was and tried to look it up in the dictionary, but I couldn't find it.   
After asking Kermit and looking at Wikipedia, I realized "How the grinch stole Christmas!" is one of the best-known children's book.  So everyone knows this term naturally.  
Sigh... This incident reminded me again how different my cultural background is and the challenges of getting a marketing job here....  
What can I do to change? How can I fit myself into the culture better?