Abbreviation for Belchertown in western Massachusetts. So used because the name, Belchertown, reminds people of belching (burping) and of belchers (people who burp).
Sadly, Belchertown replaced the original name of the town: Cold Spring.
What are ya'all on about? Everyone knows it stands for Blenheim. Yeh, thats right Blenheim, Marlborough, Sth Island, New Zealand, South Pacific, Sth Hemisphere, Earth.