To fall while skating, surfboaring, in-line skating, etc... and skid, bounce, and/or roll several times across the surface of the medium. In short, a massive whipe out. Based onthe epic crash landings of the anime "Dragon Ball Z."
Benzodiazepines (Valium, Xanax etc.); a class of tranquilizing drugs that reduce stress and anxiety. They have replaced barbituiates and serve well for recreational purposes. These are examples of downers/depressants other than opiates.
The protocol for giving great oral sex. Stands for "Button, zipper, down" (referring to what should be done with the pants). The B and D should be done with the hands, and the Z with the teeth. However, if you are talented enough to do all three with your teeth, go right ahead.