"DVDA" was a video series in the 90s, and early 2000s, where two guys would double fuck a girl's pussy, then her ass. There may be a dictionary definition you speak of, but the series did exist.
The acronym DVDA refers to the act of doing double anal and double vaginal at the same time, so four cocks are needed. To my knowledge, its never actually been done... would love to have someone prove me wrong!!!!