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BYOB

or BYO

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  1. bring your own bottle, as of liquor or wine: often included in an invitation to indicate that the host will not provide liquor.
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Origin of BYOB

First recorded in 1970–75
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for byo

BYO

noun
  1. Australian and NZ an unlicensed restaurant at which diners may drink their own wine, etc
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Word Origin

C20: from the phrase bring your own

BYOB

abbreviation for
  1. bring your own beer
  2. bring your own booze
  3. bring your own bottle
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for byo

BYOB

initialism for "bring your own bottle" or "bring your own booze," by 1951.

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Online Etymology Dictionary, © 2010 Douglas Harper