Acronym: Bring Your Own Beer. A party where the alcohol is not provided.

A person or people that purposefully causes chaos or mischief within a group for the sake of entertainment.

BYOB is an acronym with several similar yet related expansions. The acronym is most often associated with a social gathering (a party) at which the host will not be providing alcoholic beverages; the guests are invited to bring a beverage of their choice for their own consumption.

Common expansions of the acronym include:

Bring Your Own Bottle
Bring Your Own Booze
Bring Your Own Beer
Bring Your Own Beverage

A song by System of a Down, off of their fourth album "Mezmerize". The song is a gift from God himself.

Bring Your own Bagpipes

Used for hardcore Scottish parties.

Bring your own beer, booze, bitch, and/or bombs.

Bring your own Burrito,

used for hardcore mexican parties.