BYOB

BYOB

"BYO" is an abbreviation for "bring your own." What the second "B" stands for in "BYOB" is disputed; both "bottle" and "booze" are often used. "BYOB" is typically used of a place or event that does not serve alcohol but permits patrons to bring it with them. The restaurant is BYOB, so I’ll stop and pick up a bottle of wine on my way there.
Farlex Dictionary of Idioms.

BYO(B)

mod. bring your own (booze or bottle). (Initialism.) A note on the invitation says that the party is BYOB.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • BYO
  • AIIC
  • bo
  • TMI
  • Y3
  • WYM
  • YTF
  • FWIW
  • shwoman
  • WUU2
References in periodicals archive
Metohu says when Cafe Espresso started, the BYOB model was "just less of a headache." While liquor sales can add to the bottom line of each tab, it can be a risky investment.
I would have paired three wines with the four courses I was served at each BYOB.
Town Administrator John Coderre said the policy was created to mirror regulations in place for license holders, and was created in case the town should find itself without any available licenses and a heavy demand for BYOB. Neither one of those conditions currently exists.
Some selectmen were in favor of prohibiting BYOB, saying it puts restaurants that choose to invest in an alcohol license at a competitive disadvantage.
Goodrich said she would like to see a sign in any BYOB establishment informing customers that they had to tell the manager if they had alcoholic beverages.
Goodrich said no applications for a BYOB license have been received.
Selectmen established a policy for any establishment holding a BYOB license, which the board controls.
Jacobson said no application for a BYOB juice bar license had been submitted, though some interest in obtaining one has been shown by local businesses.
Councilors considered placing a BYOB restriction on the common victualer's licenses that are renewed every year but were told by members of the License Commission that there is nothing in the city's regulations prohibiting BYOB.
He read from a legal ruling the commission had received from the city solicitor that stated nothing is in city regulations prohibiting the practice of BYOB.
He agreed the BYOB practice was an unsafe one without controls.
The proposed ordinance comes on the heels of a noticeable increase in city establishments posting BYOB signs, according to police Detective Lt.
Police, the city Legal Department and the License Commission started preliminary discussions about regulating BYOB in the city at their meeting yesterday in City Council chambers.
"I see potential problems with BYOB being unregulated."