There are atleast 2 bands called M.O.D.
1) M.O.D. (Method of Destruction) was a crossover thrash/hardcore band, formed in 1986 by vocalist Billy Milano after the disbandment of crossover pioneers S.O.D.. Their first album, U.S.A. For M.O.D., was produced by S.O.D./Anthrax guitar player Scott Ian. The intended irony of M.O.D.'s lyrics and the music is a pattern that Milano and company follow in an effort to make the music humorous, entertaining, and lighthearted.

Read more about M.O.D. on Last.fm.