BRB

BRB may refer to:
 * Banco de Brasília, a state-owned Brazilian bank
 * Bank of the Republic of Burundi or Banque de la République du Burundi, the official name in French of the central bank of Burundi
 * Barbados, ISO country code BRB, country in the Caribbean Sea
 * Barreirinhas Airport, IATA Code BRB, airport in Barreirinhas, Brazil
 * Bayerische Regiobahn - regional railway company in Bavaria, Germany, a subsidiary of Transdev
 * "Be right back", in Internet/chat slang, also sometimes treated as a synonym of "bathroom break"
 * The Beatles: Rock Band, 2009 music video game
 * Benefits Review Board, a part of the United States Department of Labor
 * Beta Ray Bill, a fictional character from the Marvel universe
 * Beveled rim bowl, clay bowls most common in the 4th millennium B.C.
 * Bibliothèque royale de Belgique, the Royal Library of Belgium
 * Big red button, a type of command button
 * Birmingham Royal Ballet, a ballet company
 * Blaire Reinhard Band, a New Jersey rock band
 * Blood-retinal barrier, cells in the eye that prevent certain substances from entering the tissue of the retina
 * Brandenburg an der Havel, German car number plates BRB, town in Brandenburg, Germany
 * BRB Internacional, a Spanish animation studio.
 * Brienz Rothorn Bahn, a Swiss railway
 * Brigade de répression du banditisme, a special police unit of the French Ministry of the Interior.
 * Brazos River Bottom, an LGBT club in Houston
 * British Railways Board, the former governing body of British Railways
 * BRB (Residuary) Limited, its successor
 * Britton-Robinson buffer
 * Buckling restrained brace, a specialized earthquake bracing system
 * "BRB", a song by Bazzi from the album Cosmic
 * "BRB", a song by Ciara from the EP CiCi