This page provides all possible meanings and translations of the word BYOB
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BYOB or BYO is an initialism meant to stand for "bring your own bottle," "bring your own beer" or "bring your own booze."
BYOB is often placed on an invitation to indicate that the host will not be providing alcohol and that guests are welcome to bring their own. Some business establishments may allow patrons to bring their own bottle, subject to fees or membership conditions.