1 definition by whatthefrogger
A fictional drug used in jokes. Actually stands for dihydrogen monoxide, otherwise water. The victim is initiated into the horrors of dhmo, with sentiments along the lines of utmostly bad trips, eternal addiction, and withdrawal culminating in death.
"Lucy was horrified to find that the government was putting dhmo into the water supply," said Jack with a chuckle.
by whatthefrogger May 11, 2006 add a video