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1.
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"
by Sammy C July 02, 2006
 
2.
The act of getting laid away or paying full price for anything. Generally but not limited to automobile transactions.
I BZ'd that guy and his wife on the 2010 Volkswagen Passat.
by scrun May 08, 2013
 
3.
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.
by squirrelgirl098 July 28, 2011