What does BDIU stand for?

Biggest Douche in the Universe (South Park)

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Bus Direction Becton Dickinson Immunocytometry Systems (San Jose, CA) Birth Defects Information System (Minnesota Department of Health; St. Paul, MN) Broadcast Disconnect (AT&T) Building Department Integrated Solutions (Hialeah, FL) Building Diversity in Science (Daly City, CA) Buoyancy Driven Instabilities in Single-Bubble Sonoluminescence Battelle Developmental Inventory Screening Test (pediatrics) Binocular Depth Inversion Test Bit Depth Increased Technology		Bundesverbandes Deutscher Inkasso Unternehmen (German: Federal Association of German Debt Collection Companies) Bibliothèque Départementale d'Ille et Vilaine (French library) B'nai David-Judea (synagogue; Los Angeles, CA) Banjarmasin, Indonesia - Syamsudin Noor (Airport Code) Belle de Jour Black Diamond Jersey Blackrock Enhanced Dividend Achievers Trust (stock symbol) Blague du Jour (French: Joke of the Day) Brian d'Arcy James (composer/musician) British Dental Journal