BZD
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.
"Ugh, I'm feeling nervous about this class presentation."
"Here, take a few BZDs to calm you down"
"Here, take a few BZDs to calm you down"
BZD
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.
Sarah is such a whore. She BZD-ed Tyrone 10 minutes after meeting him.