Definitions include: shortened version of "okay, thanks, bye." APA. Bay Breeze Yacht Sales. Is it really so hard to type one extra letter? 1. Suggest to this list. BBY means Baby. Used often on Facebook, Instagram, Twitter, and similar websites, the meaning of BBY is typically Baby. Share BBYS Abbreviationpage. Abbreviation for baby. All Acronyms. BBYS Abbreviation. Used often on Facebook, Instagram, Twitter, and similar websites, the meaning of BBY is … Other terms relating to ' Internet, texting, SMS, email, chat acronyms (list of) ': ITIGBS. BBYS. dictionary definitions for Twitter language,Sms Speak,txt msgs, txt messages, texting, Text sms phrases, SMS lingo, Tweat, Txt messaging language bbys has the following definition + add your definition baby's baby's is used in Texting Definitions include: acronym for "I think I'm going [to] be sick" or "I think I'm gonna be sick". HLW. 2020. kthanksbye. Alternatively search Google for BBYS.