Big Damn Number
Online jargon, also known as text message shorthand, used primarily in texting, online chat, instant messaging, email, blogs, and newsgroup postings, these types of abbreviations are also referred to as chat acronyms.
It is frequently used by sales and marketing execs to emphasize value. For example, a $10,000 per month savings isn't as impressive as an annual BDN of $120,000.
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NetLingo Classification: Acronyms and Text Message