B.Y.O.B. . B.Y.O.B. (Abbreviation) {informal} Bring Your Own Bottle. Frequently written on invitations for the kind of party where people bring their own liquor. Categories: add yours abbreviation {informal} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 » In RussianTo section: B Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Comment on this entry