Douglas Harper's Etymology Dictionary
O.D.
abbreviation of overdose, attested from 1960.
WordNet
o.d.
v. dose too heavily; "The rock star overdosed and was found dead in his hotel room" [syn: overdose]
Wikipedia
O.D. (musician)
O.D. is one of the founders of the industrial/ metal/ electronic band Velcra. He has worked on samples/programming and guitars on the band's first two albums and is the main producer on their third album.