BU, Bu and variations may refer to:
Bulgaria (; Bulgarian: България, tr. Bǎlgariya), officially the Republic of Bulgaria (Bulgarian: Република България, tr.
Budapest (Hungarian: [ˈbudɒpɛʃt]) is the capital and most populous city of Hungary and one of the largest cities in the European Union.
Buenos Aires ( or ; Spanish pronunciation: [ˈbwenos ˈai̯ɾes]) is the capital and most populous city of Argentina.
Bupropion is a medication primarily used as an antidepressant and smoking cessation aid. It is marketed as Wellbutrin and Zyban among other trade names.
Buffalo () is a city in western New York state and the county seat of Erie County, on the eastern shores of Lake Erie at the head of the Niagara River.
The Bugatti Veyron EB 16.4 is a mid-engined sports car, designed and developed in Germany by the Volkswagen Group and manufactured in Molsheim, France, by Bugatti Automobiles S.A.S., named after the racing driver Pierre Veyron.