bring your own bottle, as of liquor or wine: often included in an invitation to indicate that the host will not provide liquor.
Origin of BYOB
First recorded in 1970–75
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for byo (1 of 2)
Australian and NZ an unlicensed restaurant at which diners may drink their own wine, etc
Word Origin for BYO
C20: from the phrase bring your own
British Dictionary definitions for byo (2 of 2)
bring your own beer
bring your own booze
bring your own bottle
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
initialism for "bring your own bottle" or "bring your own booze," by 1951.
Online Etymology Dictionary, © 2010 Douglas Harper