MBB may refer to:
Television Men Behaving Badly, a British television sitcom Mrs. Brown's Boys, a television sitcom
Brands and enterprises Malayan Banking Berhad, a bank and financial group in Malaysia McKinsey, Boston Consulting Group, and Bain, the world's three largest strategy consulting firms, referred to as "MBB". See Big Three (management consultancies) Meridien Bank Burundi, a defunct bank in Burundi Messerschmitt-Bölkow-Blohm, a former West German aircraft company, now part of Airbus MBB Architects, an American architecture firm
Other uses Magandang Balita Biblia, a Tagalog translation of the Holy Bible Maharaja Bir Bikram University, in Tripura, India Make-before-break, a type of contact arrangement of an electrical switch Marginal Budgeting for Bottlenecks, a planning and costing tool to "buy health results" Master Black Belt, a certification in the study of Six Sigma and Lean Six Sigma Medal for Bravery (Bronze), an honour in Hong Kong Men's Basketball, men's college basketball Millie Bobby Brown, an English actress Minimum bounding box, the box or hyperrectangle of minimal dimensions that contains the set of interest Mobile broadband, the name used to describe various types of wireless high-speed internet access through a portable modem, telephone, or other device Molecular Biology and Biochemistry, the name of departments in several universities Montgomery bus boycott