Dirty Rotten Imbeciles (often abbreviated and referred to as D.R.I.) is an American crossover thrash band that formed in Houston in 1982 and would later relocate to San Francisco. The band is currently composed of two of its founding members, lead vocalist Kurt Brecht and guitarist Spike Cassidy, as well as bassist Greg Orr and drummer Rob Rampy.

D.R.I. never gained a mainstream audience, but the integration of their hardcore punk roots with thrash metal influences was a stylistic catalyst for their contemporaries – most notably Suicidal Tendencies, Corrosion of Conformity, Stormtroopers of Death, the Cro-Mags, Nuclear Assault, Adrenalin O.D., and Cryptic Slaughter – alongside whom they are considered to be one of the major pioneers of what would later be called "crossover thrash". These bands had a heavy influence on modern thrash metal